Proof of work is still the best security model, you just have to make sure you're on the chain that has the most, which is Bitcoin.
Approximately 98% of all proof of work mining goes solely into securing Bitcoin. The remainder is divided among bcash, bsv, dogecoin, litecoin, monero, etc.
To try a 51% attack on Bitcoin, you have to:
-Source tens of billions of dollars worth of ASIC machines
-And you would need over a dozen nuclear reactors worth of electricity to power them
It really should be a no brainer to choose Bitcoin to store your wealth in. Nothing else compares, nothing else competes.
