It only becomes a reasonable solution if they use or otherwise peg to Bitcoin blockchain. 

nout

Financial incentivation is like a magic spell. Bitcoin fixes this.

zuspotirko

bitcoin

During the last weeks Tor received few disruptive DDOS attacks which have halted the usability of Tor even for us, bitcoin node operators.

I was lurking the [Tor proposals list](https://gitweb.torproject.org/torspec.git/tree/proposals) and I stumble upon two interesting DDOS mitigation proposals by George Kadianakis, Mike Perry, David Goulet and *tevador*, specifically the proposal number [327](https://gitweb.torproject.org/torspec.git/tree/proposals/327-pow-over-intro.txt) and [331](https://gitweb.torproject.org/torspec.git/tree/proposals/331-res-tokens-for-anti-dos.md)

Interesting points are the fact that these proposal introduce a proof of work system and a token both used to identify and prove that a user is a genuine user and not a bot. 

Could this be a valuable solution to DDOS? What if Tor adopts bitcoin instead? 