I would never say that it is the end of Bitcoin, I always base myself on the prediction model of PlanB, I believe a lot because it has expiration, also despite the great correction that the market has at this time it is essential to hold on to believe in Bitcoin, a correction of this type is normal, as stated by Peter Brandt, PlanB continues to believe that it can reach $288k, and that this 2021 is not the end of the bullis trend, some believe that for Bitcoin to be complete it must do something to reduce consumption electricity and the pollution it generates, at least that's what the president of Ripple thinks:
“I would argue that such a change is critically important for Bitcoin to remain the world’s dominant cryptocurrency. PoW’s current energy demands and carbon footprint are already unsustainably high, with Bitcoin alone consuming an average of 132 TWh a year (equivalent to roughly 12 million U.S. homes), and releasing an estimated 63 million tons of CO2 annually.”
Source:
https://zycrypto.com/what-bitcoin-must-do-to-remain-the-crypto-top-dog-according-to-ripple-chairman/Of course this is a personal opinion, but it may have something of relevance, however if something is done against this problem things will get much better.