No. What you’ve described would apply to short selling but not all short positions. If you buy a put on Ethereum (the right to sell at a specific price by a cer

No. What you’ve described would apply to short selling but not all short positions. If you buy a put on Ethereum (the right to sell at a specific price by a certain date), then you are short Ethereum because you benefit from price declines. Your losses are limited to what you paid for the put. You just need to have the cash for it and you can do so on LedgerX/FTX.