Currently Bitcoin has a delay of something like 50 blocks before the block reward is spendable. This imposes a minimum size on the amount of float needed to pull off the attack.
One strategy any proof-of-work chain can use is to just increase the delay. This doesn't mitigate the attack vector though so much as just make it a bit more expensive to get started. It also has imposes some extra costs on miners and may discourage smaller miners from even joining the network.
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[ 3.1 ms ] story [ 12.6 ms ] threadOne strategy any proof-of-work chain can use is to just increase the delay. This doesn't mitigate the attack vector though so much as just make it a bit more expensive to get started. It also has imposes some extra costs on miners and may discourage smaller miners from even joining the network.