> If miners drop out producing a decline in hash rate but transaction volume remains the same or higher, doesn't "the difficulty adjusts" imply that Bitcoin wou

> If miners drop out producing a decline in hash rate but transaction volume remains the same or higher, doesn't "the difficulty adjusts" imply that Bitcoin would get less secure? It’s not incorrect to say, but you have to be careful with what you mean by “secure”. The attack is one miner with 51% of the hashrate controlling consensus. This still doesn’t mean your bitcoin gets stolen, it does mean bitcoin fails it’s mission in that the one user controls which transactions make it on chain. However the value of controlling bitcoin is proportional to the market cap of bitcoin. Hashrate also scales with the market cap. So arguably it would never be worth executing this kind of attack. The same is true of the zillions of tiny PoW coins out there.