>Crypto requires a complex network infrastructure that is easy to knock offline. Could you elaborate upon that? >AI is already rumored to be able to crack cryptographic algorithms like block chains. If this were the case, someone would crack Satoshi's BTC. It hasnt happened, ergo it's FUD. >Quantum computers may make crypto currency a failed store of wealth So may a civilization ending solar flare. Which has yet to occur. >Governments probably have the computational power to double spend and or track people's transactions without their being aware. 51% attacks can't be cost effective because purchasing that much computational power would require incredibly long lead times and be very obvious, plunging the asset value to zero before you can steal it. >Furthermore, storing crypto in wallets you don't own is downright dangerous I concur, it's risky. Granted, the same risk applies to bank accounts.