Investment is good strategy but for those who has much knowledge to understand this thing and one more thing which is important is that you should make investment in more than a single coin as it can enhance the options of your profit. Also affordable money should be utilize as its take much energy and much time to recover it back once you loss.
Investing requires a lot of knowledge to understand the market situation to get an idea of the right trends. If you invest in the wrong trend and divide your funds and invest in different coins then you will not get good results from it. So market research is very important before making any kind of investment, even the top coins can't hold their position when the market changes the trend. So I think the right knowledge about the market can make an investment successful.