You could sell dollar calls for BTC and cash that out immediately. Opens you up to larger potential losses, but at least this way you're the risky counterparty. :)
When someone expresses the desire to be "long", they mean they want to buy an instrument, rather than sell it. I want to buy puts, which means I profit if the price goes below the strike. Selling puts means I profit if the price stays above the strike. Since my belief is that BTC's long-term value is zero, selling puts is the last thing I'd want to do.
Not bitcoin puts, dollar puts. You have a tuple for each option position (buy or sell, call or put, usd or btc). You wanted to buy btc puts (buy, put, btc). You can create a similar position by reversing any two of those. I suggested, after the correction, (sell, put, usd). Another possibility is (buy, call, usd). Or (sell, call, btc).
Unfortunately any position you buy is going to have counterparty risk, that's why I suggested selling. Well, it's not a real suggestion, just a thought.