If someone bought $100 of Bitcoin in 2010 and kept it until now, they would now have around $6 million.
Do you think the same could happen again in the next 7 years? If I now own $500 in Bitcoin could that be worth $1 million+ in the next 7 years? Or is it extremely unlikely for this increase to happen a second time?
It is unlikely, you imagine you're not the only one, so everyone will not become millionaires. They just will not let it, and everyone will collapse the market, and all the money will be gone, so I advise you to partially withdraw money. While they have at least some value.