1/ Potentially contentious idea 
while ASICs have been a centralizing force on mining, they are also a key 2 #Bitcoin's long-term security
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3/ A nefarious actor needing to buy equipment to 51% attack
#Bitcoin would have a hard time amassing the ASICs due to this supply constraint
I think you mean "outside actor". Whether they are more or less likely to be nefarious than an inside actor remains an open question.
