I think The value of Bitcoin is highly volatile, and its price can fluctuate significantly in a short period of time. This makes it a risky investment, and some experts warn that the cryptocurrency may be in a speculative bubble.
It always depend on what we see and what we believe if you believe that bitcoin is a speculative bubble then that is your decision to believe and if you believe that bitcoin is risky investment than any other coin in crypto then its up to you, but i think we already saw the bitcoin price is rising from pizza to car look at the difference for now in my country you can buy a car with one bitcoin unlike in year 2010 you can only buy pizza, so choose what you are going to believe, is it the things that we already experienced or is it the speculation in the incoming future of btc that said to be a speculative bubble.