“Bitcoin security” is a different notion than almost all other popular chains. A prolonged 51% attack on bitcoin implies the ability to double-spend, but not at all the ability to affect prior balances. A 51% attack on most smart contract chains implies the ability to change any and all state arbitrarily.
The simplest solution is to wait until the cost of hashing exceeds the value of your transaction by some reasonable factor. I expect that better solutions will come along by soft fork without adverse effect on supply or decentralization.
The simplest solution is to wait until the cost of hashing exceeds the value of your transaction by some reasonable factor. I expect that better solutions will come along by soft fork without adverse effect on supply or decentralization.