Great thing with P2P is that you can choose what price you want, because you yourself can set the buy offer(or of course, choose between other existing sell offers). It's just you might end up waiting a while to receive an offer. As for the price premiums, no idea on that.
Thanks for pointing this out. In this usage setting, I think the concern is not really the price of btc I buy at rather the price I buy in China vs I sell here at US. Ideally I would want buy/sell price is almost the same and the time between buy/sell is as short as possible so that I'm not exposed to bitcoin volatility. Recent btc volatility is relative low but I've been btc dropped 10%+ within 15min time frame.
A separate question, is there way for small user like me to hedge btc price risk in a short time frame? Let's say I buy 0.1 btc in China. I know takes 30 mins for trade to settle/escrow then transfer to US exchange. Within these 30 mins is there a cheap way for me to lock in the price of btc? One idea I have is use the Defi loan in Ethereum:
1. Buy 0.1 btc in China
2. Take out a defi loan and borrow 0.1 btc then sell those 0.1 btc immediately. Hopefully btc price at 1) and 2) are close. Hopefully interest rate is not that high. This is also part of the cost
3. Transfer btc to defi loan so that I repay the btc loan
Does this look practical?