Ok neither of these are easy but as a long term strategy to do think its best to day trade and try and get 1-2% a day or invest in a couple of coins and try and get 20% over a month
every trader has different skills, so just adjust to your skills, but if you have a short-term strategy that can really profit 1-2%, of course it's better because in every month you will produce 30-60%, but if you can't, don't force it, 20% is also worth a lot if you have a large capital.
Not only depends on the skill, but depends on the coins you buy too. Not all coins you buy can have a high increase or even have a price increase that day. adjust the profit you will take from the market situation of these coins you buy, if the coin has the possibility to go higher it is not a problem to wait until the price rises to above 10%, that includes large profits in one day, many altcoins can go up more than that in just 1 day, once again it depends on the market conditions of each coin.