I think I've become desensitized after experiencing at least two full cycles between bull and bear market. Not sure since when I've become like this, but I believe seeing my portfolio went -75% and then recover the next cycle makes me think I shouldn't overestimate myself and just DCA and collect Bitcoin. As of now, I don't even follow Bitcoin price movement minute by minute and if I plan to sell some Bitcoin I'd put a stop loss order or something similar. Obviously I prepare another wallet for short-term purpose, hence why I still have a notification settings on my phone for short-term movement, but I'm not actively monitoring it.
I second the opinion that you should use the money you can afford to lose, since excessive stress usually comes from overspending and a mistake in budgeting. I do agree that it's hard to not feel anything when you see your wealth decrease in real time though. CMIIW.