Ask for a BTC address and send a tip.

Alternatively, ask them for their preferred payment method and don't force your FOTMcoin on them.

I assume he suggested Bitcoin because it's still a good way to handle money anonymously. If the person that breached the server wants to remain anonymous but get paid, that's pretty much the only way to go.

Except for the fact that the transaction becomes a permanently public record.

You could also get looped into tax evasion if the person you paid doesn't report the bug bounty income. You can still maintain anonymity by not announcing the person who found it, but it's not a good idea to give money to anonymous people for work.

I assume he suggested asking them because Bitcoin isn't the only cryptocurrency.

I'm pretty sure the hacker won't want dogecoin or forked coin.

Oh I don't know, depending on the person they might want some fringe criptocurrency that they swear is the best (for non-economic reasons)

Bitcoin is flavor of the month now? Do we live on the same planet?

If only the planet weren't so big.

If you're sending an even slightly significant amount of money, there are potential tax implications too. You might need to do a 1099.

Haha! I don't know how you intended your comment, but I just had a funny thought of filling out a 1099 for blackmail.