Which do you prefer?

Hello Everyone, want to ask few questions here.
Short term or Long term investment?
Which is more profitable to you?
What coins do think that is good for long term now?
Feel free to comment your ideas and opinions.
Both short term and long term are important for trader.But long term is better than short term, because long term has little risk. So long term is more profitable for me.First and foremost, I would like to invest Bitcoin for long term.There are more few coins which are important and trustworthy such as ETH, XRP, EOS, LTC, USDT etc.