Hate to say it, but if this is true that 51% attacks on coins are cheap, ALL SHIPS will drop with the lowering tide. While it might be true that some other proof-of... is better than POW, the crypto-world will NOT interpret that way... not initially. If 51% attacks get out of hand, all crypto-currencies are going to get donkey punched. So be careful what you say when you disparage other cryptos.

Think of it historically, what happened when just ONE exchange had a security breach (like Mt Gox)? Bitcoin and any cryptos at the time, got crushed. So unless you like short-term large-% losses, you should be hoping NONE of the cryptocurrencies suffer security breaches-- unless of course all you own is fiat, gold, and non-crypto assets!