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?
Unlikely to happen again since the price of bitcoin will have a decrease in acceleration. It will continue to increase but then not as much as it did in the past two years. Bitcoin's investment will only return some investment but the glory of that is in our hands. There is always a risk but then you should still hold and hope that you can have greater profit.