I don’t know much about what coin coinbase is going to support, but i assume business-wise they’d go with the 4th largest market cap(after filtering the other bitcoin forks, ripple, and maybe dash - they are shady because of premining and ripple owns a big chunk and can end up controlling the price - might be what you are looking for).
Monero is special:
because it’s private. When you send money to some address, nobody can see it. On bitcoin ledger, the transactions are transparent - you move money from one address to another, it’s visible. Think this way: Everybody knows satoshi is a billionaire, but he cannot move his funds (if he’s alive or he cares), because if he did, people would immediately know who he is - as soon as he converts to fiat. Monero also doesn’t have the rich list. Your money is your own, and nobody’s business.
It’s fungible, meaning nobody can blacklist coins and prevent transactions.
What I like about monero, though, is its community.
but YMMV, don’t take investment advice from a random internet stranger. I am certainly not in it for speculation, though it’s nice to see them going up I don’t have significant positions, though - i was mostly an enthusiast with little funds in the whole thing.