There are less people today interested in buying Bitcoin than 10 years ago
Bold statement. On what exactly you base it?
It is possible, until it is worth a very good amount, to keep it patiently. If 1BTC is currently $64k, I believe it could reach 1 million in the next 15–20 years.
The only problem is that 1 million will miost likely (give how things are developing) be worth way less in 20 years than it is now so who knows, maybe even 1 BTC won't make you rich then.
However, that makes bitcoin even more important as a great asset to fight the inflation and for sure beats to holding the fiat.