It does irrefutably link a very large amount of bitcoins with the site.

https://live.blockcypher.com/btc/tx/c44ad5f83ddc84d08967c765...

He also links to a couple of completed donations. The first is a transfer of of 64.77BTC (approx $1M) to address 1AttfyuVVVpsJ6FzBcJMqkFrPRzFiQoRb6 which is definitely Watsi's BTC address:

https://twitter.com/watsi/status/938241988121583616

I'm having a bit of trouble connecting this transfer back to address 3P3QsMVK89JBNqZQv5zMAKG8FK3kJM4rjt which currently holds the coins that he says will be donated. If true this should be possible though...

EDIT: Oh wait, here is the connection:

https://blockchain.info/tx/d290acbfa7c619ad4215537ae83bfe165...

I have to say, I'm generally pretty skeptical of stuff like this but there is evidence here that this is legit.

EDIT2: They also encoded "pineapplefund.org" in a NULL transaction. Even more reason to believe.

https://live.blockcypher.com/btc/tx/c44ad5f83ddc84d08967c765...

AFAICT he's only giving money away, not asking any. What's sketchy about anonymous donations?

I was confused by the

"4,894 BTC ~$84 million USD remaining"

on the site. It initially appeared as if he/she was asking for donations. I guess that's actually the amount of money yet to be distributed.