I prefer long-term investment because I think long term is more profitable because the price of coins will always go up from year to year 
Yes, i agree with you, friend. Investing crypto is my part time job, so that i have a long term with them, i spend my free time to research, after that i buy some good Altcoins/ICO and HOLD them. At now i think i can win with my strategy. Good luck to you.