haha You probably remember this post of mine https://steemit.com/cryptocurrency/@ghayas/have-you-ever-felt-that-whenever-you-buy-a-coin-the-price-goes-down-and-vice-versa

I just updated it last night and what happened to me again with the WAVE trade and to be honest even as I type I still have a BTC-WAVE market tab open :). I am doing worse than you but I get out of it in the end very nicely. In fact, I end up with more coins than the previous one.

The strategy is simple, use your resource to find out when is the bottom for a currency. We are probably at a very good stage of market, if you invest in BTC you will get profit and if invest in good altcoin you will profit as well. :)