I'm running a full archive node to receive and send funds (ETH & other tokens also). The size of the blockchain is very large, so I'm thinking about storing it remotely and mount as an sshfs network drive. (mounting a Sia storage with repertory hmmm, will be very sexy) Is it fast enough, or that's a very bad idea? Parity? Geth? What's about other coins (for example Bitcoin)?
Only when that data is being queried, e.g. through JSONRPC.
You don't need an archive node just for sending ETH and tokens, though. They are only useful if you want to get the state for any block at any time. A full node is sufficient for most tasks, and is only about 200GB in size right now, compared to 3TB for an archive node.