Of course Simply,Sell all my Coins on hold and wait for the dump again and Buy,all the crypto in my hands are amount that i can afford to lose so basically i can do what ever i wanted.
One word of advice:
never sell all your coins.You might think you're brilliant for selling at $50K. Nice profit, right? Then the market shoots to $500K while you're waiting for that crash.
By all means, have a trading stash and take your shots. But you should always have a healthy cold storage stash you don't intend to sell anytime soon. Think of it as your retirement savings, your children's savings.
Every time Bitcoin reaches a new ATH, I'm reminded of my regret for selling so many coins over the years. In a bull market, your orientation should be such that your primary concern is about
not losing coins, not about profiting in dollars.
I'll happily sell all my coins between $60k and $80k/$90k. Cuz I'll be financially set for life at that point (I already retired early about a year ago thanks to having a trading stash making me money and my long term bitcoin waiting to get up to high 5 digits) - so that's good enough for me! Though of course if it did go to $500k (or even $150k) right after that I'd be hitting myself haha, but I'm pretty dang sure $100k give or take twenty or thirty thousand is gonna be the next peak. I'm more worried about the peak being lower than I think (like $60k) and missing out on selling most of my Bitcoin, than selling too low and watching it go like over $150k.
But yeah in general always keeping at least a little skin in the game is good - I have realized that lesson in trading, when I sell everything on a surge but then it keeps going a couple thousand dollars higher!
I have most of my coin held for one market cycle (well some of it is still from 2017 somewhere between $1300 and $7000, but the vast majority of it is from this market cycle in the $3000s in early '19), so I can sell late in the bull run and buy back near the bottom of the next bear market. And then I have a bit of coin as trading stash. Don't do the multi-cycle stuff though, but I can see how having a bit set aside for longer than just one cycle keeps you in the money in case the price goes drastically higher than assumed.