[buboard]

there are alternative coins that are much faster. plus there are many of them, so if a blockchain is slow, people will theoretically be able to switch to another. having 3-4 different coins in our digital wallets doesn't seem like its going to be a huge hassle, especially if it is going to be easy to exchange between them.

[sshine]

Smaller coins are very inexpensive to double-spend.

There was someone on hacker news some months back who collected donations to proof-of-concept abuse one or more.

So a safer alternative would be a token coin on Ethereum, since you're not actually switching to a microscopic, unknown and thus abusable blockchain.