I have informations that apparently the issues of Bittrex will be resolved today

Even with new message, saying they waiting for an update from dev?

Is there a fresh downloadable blockchain snapshot? Sync takes forever.

SiaHub makes daily snapshots of the blockchain: https://consensus.siahub.info/ Follow this instructions for bootstrapping here: https://siawiki.tech/daemon/bootstrapping_the_blockchain

Thanks, that's helpful