About the first point: I assume that there is a risk of failure on this currency given that bitcoin is still beta software. I don't know if my concern about that is unreasonable or not, but there are certainly risks I can think of.
About the second point: It is possible that there was no transaction volume in bitcoin's first 20 years. However I wouldn't worry too much about that because up to now the volume of bitcoin has been huge and bitcoin has dominated the market for a long time.
Then, what do you think about the two points above.
First point: if bitcoin is only a beta software, that means it is in the development and testing stage and bitcoin has been tested for the past 12 years without any problems so it can be said that it has become the official version. At the software level, it is already official and safe to use but when it comes to investment, any investment is risky, even stocks or gold are risky so invest within our means. This is common advice in finance and is not specific to bitcoin.
Second point: With what's going on, this is really nothing to worry about anymore, things are getting bigger and bigger than we thought.