This is a nice move investing in altcoins to make profit than mining rigs of your choice. Some of my friends already sold their equipment due to not worthy and not profitable. Investing in the top altcoins when price is not yet high is a wise decisions. As what others been saying, invest on what you can afford because market is volatile. The market is in red marks so good opportunity to shop and hold in your bag.
It was a good decision as long as you are investing in a right coin wherein you are gaining profit and not incurring any losses. I do not suggest mining rig anymore because of the other expenses like electricity and many more. In terms of investing it in altcoins, you just need to have a lot of patience.