The returns will be greater if it continues to be made with time and the price of bitcoin goes up.
People's problem is short-term investments, and the graph has proven that even short-term investments in one year are ideal and profitable, other than in two cases.
The price will continue to increase, but if you buy in large amounts when everyone wants to buy, facts may come true, other than that, continuous buying makes profits.
Did anyone validate this chart? It is using 31st Dec prices for each year?
this chart for 2020 only, 2021 not included but price was at least doubled/