$25 a Month Went Into a Custodial Crypto App for My Teen. The Catch Sits on Page 4.

Twenty-five dollars, on the first of every month. That is the automatic Bitcoin buy my 16-year-old and I set up together at the kitchen table on January 5, 2025, forty-five minutes before his curfew, his thumbs driving the app and mine holding the card that funds it. The deal took eleven minutes. The part that took longer to find was on page 4 of the account agreement, and I will show you the exact sentence.

He earns $84 a week restocking bikes at a shop on Meridian Avenue, and I wanted his money education to include the asset class his generation actually argues about, without handing a minor the keys to anything. The arrangement: $25 of my money auto-buys Bitcoin on the first, he logs it in a notebook he mostly keeps current, and we read the monthly statement together like it is a utility bill. Fourteen buys later, that is $350 of principal and $86 of market luck stacked on top.

The catch is not a fee. None of it is his. The account is custodial, the app holds the keys, and the agreement says in writing that everythin' in it belongs to me until he reaches the age of majority, which in our state is 21, not 18. He found that out the same night I did, and his face did something I had not seen since we told him Santa ran on a budget.

the January setup

Setup took one phone, one parent, one teenager, and one SSN, mine, not his. The app verified me, not him, cuz legally the customer is the adult and he is a beneficiary riding on my account until the state says otherwise. We picked the auto-buy amount off a menu that began at $10, and he chose $25 cuz that was half a shift's tip-out at the bike shop and it felt grim to him. I let the number stand. The first buy hit January 6 at $91,240 per Bitcoin, $24.75 of it actually invested after the flat quarter fee.

clause nine

Page 4, clause 9, second sentence, in the same gray 8-point type as everything around it: the custodian holds legal title to assets in the account til the beneficiary attains the age of majority under applicable state law. I read it out loud at the table. He asked what majority meant. I said it means the app does not answer to you, it answers to me, and I answer to you at the dinner table, which is a different kinda custody and the only kind I can actually enforce.

the joint statement

The statement arrives as a PDF on the third of each month, and the first one confused him cuz the header carries my name in the account-holder field with his name underneath in modest type, like a Jr. on corporate letterhead. We read it together anyways. February's showed $50 of principal sitting at $48.91 after a red month, and he wrote volatility tax in the margin of his notebook, which I did not teach him and have decided not to correct.

his first drawdown

March 2025 was the month the stack dropped 9 percent in a week and he asked the real question: can I sell. The answer under clause 9 is that I can sell for him, and he cannot sell at all, which he described as the worst allowance he had ever received. We walked the sequence together, his finger on the sell button, mine on the confirm, $31.40 outta $312. The trade settled in two days. He logged it in the notebook with a margin note that just says lesson, and I let that one stand too.

what custody actually means

Custodial means the app runs the keys the way a bank runs the vault, and your name is on the statement, not on the chain. No seed phrase for him. No MetaMask, no way to move a coin anywhere without the custodian's pipeline doing the moving. If the company folds, the agreement's winding-up section on page 7 promises the assets get returned or transferred in kind, which is a promise measured in bankruptcy-court years, not days. Crypto was sposed to be the asset where you hold your own keys. For minors, the entire point is that they cannot.

the fee tally

Fourteen buys, fourteen flat quarter fees, $3.50 total, plus a spread I measured between 0.4 and 1.1 percent on the monthly statements by comparing our fills to the noon price on Coinbase that same day. Call it $7.30 in lifetime costs on $350 of principal, which is about 2.1 percent, and it stings more said as a percent than as two gas station coffees. Same buys, pennies, if he were 18. Coinbase Advanced would have taken 0.6 percent and a fraction of the spread, except Coinbase requires adulthood, which is the entire reason the app exists and the entire reason the toll rides along with it.

the day he asked for keys

In January 2026, a year in, he asked for the keys. Not the metaphorical ones. He had read about seed phrases on a forum at school and wanted 12 words on paper in a fire safe. I told him the truth, which is that the app cannot give him keys because there are none to give, and that the day he turns 18 we move the whole stack to a Trezor he sets up himself, and the two years between now and then are for practicing on paper trades with real prices. He wrote trezor at 18 in the notebook. Underlined twice. In pen.

the February amendment

We amended the deal at the same table on February 8, 2026, same curfew pressure, different stakes. Same table, same curfew. The $25 monthly buy continues, but he matches half of it, $12.50 out of his bike shop money, and the matching part was his idea, which tells me the tuition is working. The notebook has a column for the match now. Clause 9 still says what it says, page 4 still sits where it sits, and the March statement read $436, principal and luck mixed. He signed his half of the amendment with a doodle of a rocket. That is the whole contract.