Profit depends on risks. You can gain 30% weekly, but in a short run. Remember, that people like Soros and Buffett earned yearly 25-40 % and it is a strong result. So here in crypto I would set target like 200% yearly. It is a new and mostly bullish market.
What strategy would you use or suggest? I do not believe in P&D .. bots and arbitrage works but I am not sure about them.