You’re right, the upside is fixed at 17% and my comment wasn’t really addressing the contents of yours, but the general sense of unease I get talking to people about their “crypto positions” as if having some > 1% (often a lot more) portion of their whole net worth “in crypto” is a reasonable part of a balanced portfolio.
Downside is limited to your principal investment.
You can't be busted to below zero, unless you borrowed to make the investment.