Basically a person can invest for short term and for long term but we have to choose currency which is favorable in these days and depending on the situation or call. Mostly different currencies like the Altcoin, Litecoin and Neo are better for short term investment while the Bitcoin and Ethereum being valuable coins are favorable for long term investments so I would say that after successful investment all the money is yours to keep and then you know better how to calculate the profit and you can enjoy life.