what must be known is that there are two kinds of investment methods, namely in the long term and short term, and do not invest only in one direction because when we experience losses we will return to big zero, now we can invest in good ico projects and in existing coins potential to rise in price.
There are lot of investment startegies in which research is going on best method and guidelines to be followed while investing. There is 2 types on investment 1. Long Term and 2. Short Term based on your need and plan you can decide to invest in. You need to pick good projects to be benefited.If a general strategy, easier to answer with :
1. Cheap = buy
2. Expensive = sell
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*Investors are being very emotional. Now BTC, ETH, etc. Many coins are very cheap. So how much do you have? Investors are waiting for the price to increase again. Only then can they buy it.
No one buys it when it's cheap, and nobody sells it when it's expensive. Because they think the price will cost more after the cost.