I think it's hard for bitcoin to come back to old strength. There are so many new projects out there and a lot more people realise that distributed ledger technology can do much more than being "just" a peer-to-peer cash system. 50% is possible but old dominance like 80% seems way too much imo.

One question about Robinhood: Does it really work like Coinbase? I've read different things:

1. You can't withdraw/deposit the bought cryptos.
   So it's actually another trading platform and no competition to Coinbase.
2. You can withdraw but not deposit
   to avoid laundering.
3. You can do both
   withdraw and deposit - like in Coinbase

What's true? I can't test it because I'm not able to download the app in Germany.