Of course, find somebody to loan you some coin, sell it at current prices, buy some in a week when prices fall and return the coin to the lender, pocketing the price diff. Any fungible product can be shorted, all you need is a willing lender.

Assume my rhetorical question boils down to “is it possible to find a willing BTC lender with a decent enough size and non loan-shark rates”?

Or even “is there a consensus yield curve for BTC?”