Should I do DCA and hodl 50% and trade the rest?
DCA is recommended for people who can't read markets, who will simply lose their coins by trading. Personally, I would never use DCA because it has no strategy for entry/exit or risk management generally. I believe timing entries is an incredibly important part of investment.
I'd probably hodl closer to 80-90% if I were you, especially if you're comfortable using leverage. The less coins you have exposed to third party risk (holding on exchanges), the better.
At what percentages is it wise to take profits? 30/50/65%? I only trade the money that won't make me go bankrupt, but I'd love to become good at reward/loss management and start somewhere.
You need to establish a trading system. Identify setups such as candlestick formations or chart patterns where a specific trade will play out a majority of the time. I.e. a triangle breakout or a head-and-shoulders pattern.
From there, you need to establish optimal risk/reward setups. I generally aim for a 3:1 or better reward to risk ratio. That means my take-profit should be worth 3x or more what I would lose if my stop loss hits. By optimizing your risk/reward, you can afford many small losses and still be a winning trader. Remember that trading is a grind based on probability. Even great traders lose a solid 40% of their trades. So you need to account for that in your risk management.
I wouldn't determine take-profit in terms of percentages. You want to let your winners run as much as possible. I usually prefer to aim for higher take-profits while rolling up my stop losses into profit as the trade progresses.
Do you know any sources/calculators for doing statistics on profit/loss? For planning the budget? I would really really appreciate some newbie-friendly reading materials/guides or even excel sheet with pre-made formulas haha
Highly appreciate your input! Hope to return some of the good carma back to the cummunity when I become good at this
A basic tutorial on risk management in trading:
https://www.investopedia.com/articles/trading/09/risk-management.aspCheck out Babypips. I recommend completing the Elementary through High School courses:
https://www.babypips.com/learn/forexI would start out trading only a small fraction of your stash, maybe 10-20%. Each individual trade should probably only be worth a fraction of that. Use key S/R levels and moving averages for take-profit and stop-loss levels.
Good luck!