largest bitcoin miners can't attack blockchains whose proof of work algorithm is ASIC resistant or just a completely different calculation algorithm. Monero is

largest bitcoin miners can't attack blockchains whose proof of work algorithm is ASIC resistant or just a completely different calculation algorithm. Monero is a one good example (feasible only on GPU and CPU, probably needs some R&D for ASICs with memory). litecoin is BTC-ASIC resistant with ASICs tailored for litecoin are coming.