My best investment strategy is make investments in ICO's but only kinds that have experienced the supershill vetting method complete.
Investing in ICO is a good way to make instant money, this market is full of hype so if you invest choose something that is hype so when the ICO is over you can easily sell for a profit as usually they start trading over ICO.
Also, don't forget to avail the bonus, you can have that when you choose to be an early investor.
My strategy is long term, closing the positions when it's high.
Of course long term is very profitable, you don't have to be active enough, just hold and trust the coins you buy, usually it rewards the long term holders when a project is a success.