The big problem with the way that "cryptocurrencies" are talked about is that cryptocurrency is, at least in the mainstream vernacular, synonymous with bitcoin. Bitcoin is an outlier in terms of how it works and what it does. Most tokens sit on top of Ethereum and at this point it's probably more accurate to describe cryptocurrencies as being synonymous with ETH, not BTC.
In my opinion regulatory action against PoW is all but inevitable. Ethereum is a platform, so there are powerful incentives to make it work more efficiently and use less power. Those plans are already well under way and, whenever Ethereum 2.0 gets launched, the power consumption of the crypto sector will drop dramatically and the network will be massively more powerful, attracting subsequent adoption. In this case, miners and developers have aligned interests. That's not the case for Bitcoin. Existing miners benefit from PoW, so I don't expect Bitcoin to migrate without some regulatory arm twisting.
In my opinion regulatory action against PoW is all but inevitable. Ethereum is a platform, so there are powerful incentives to make it work more efficiently and use less power. Those plans are already well under way and, whenever Ethereum 2.0 gets launched, the power consumption of the crypto sector will drop dramatically and the network will be massively more powerful, attracting subsequent adoption. In this case, miners and developers have aligned interests. That's not the case for Bitcoin. Existing miners benefit from PoW, so I don't expect Bitcoin to migrate without some regulatory arm twisting.