$450 is a very small investment these days. By some very optimistic scenarios Bitcoin will reach ~$200,000 during the next cycle, so a ~x10 increase from the current price level. Will having $4,500 instead of $450 radically chance your life? Don't think so. If you bought 1 Bitcoin for $450 seven years ago, and held till now, that could have been life-changing. This is not to make you feel any regrets, but to illustrate that the market is no longer as fast growing as it used to be.
A 16 year old doesn't have to think of this cycle as his goal. Being so young he's got enough time to look at 2028/9 target. That's also what I'm waiting for since that's probably going to coincide with my retirement goals. I'd like to retire in my 40s and start spending some money, so this bull market isn't what I'm waiting for. I could easily wait if waiting meant 200 000 USD bitcoin by 2030.
I believe you OP, you don't have to prove anything. I have more BTC than you and I don't feel like proving it. If people don't believe me, even better. They won't suspect anything
Keep holding and with bitcoin you'll always have some backup money to fall back to when things go bad. Save it.