Bitcoin changes many people's lives but not everyone will become richer, there are many people investing in bitcoin losing and losing a lot.
If you do not have patience and have come to make quick money, then it is possible that you will end up selling at a loss. And lose money.
Bitcoin is a highly profitable investment but needs analysis and research
You don't need to be a master of technical analysis to invest in bitcoin. Or need do any research.
if you buy bitcoin for $69k, you are currently making a loss, not a profit.
The amount of bitcoin decreased? If You bought 1 bitcoin it is still 1 bitcoin. And that bitcoin was once at $0.01 - And it was at $69K last year like you said. And probably after next 2 years it will be above $100K
Better check bitcoin price history:
https://bitcointalk.org/index.php?topic=5257620.0 - If you have any doubts about its performance.