Let's assume someone has a bigger amount of crypto (10 BTC+). Now this person assumes that the price will drop and therefor instead of hodling, he wants to "secure" his crypto in USD and buy back at a later point. What is the best and safest way / exchanger to do this? Stablecoin? Is DAI the only stablecoin that cannot be frozen? The whole procedure also should not include any KYC. Not because it is illegal money, but because said person has heard some horror stories and wants to be as safe and anonymous as possible.