the marketcap would have to be 200 billion = 20x bitcoins marketcap
we can still hope for 1 cent per coin.
Say, you own 1b Dogecoins at the current price.
You have 2 options:
1. Start selling, placing huge sell orders and break the market down.
2. Sell only part of it, but get bigger income.
It's not all about the only market cap i think.