Hey Rtxcx!
Thats a very responsible question. As a newbie in this forum, the best way to utilize this forum is to ask questions, participate and make progress in the cryptocurrency ecosystem.

It is suggestive that you are on the right path especially since you hold a few ETH & BTC. However, on any day Ethereum, Bitcoin, Ripple, Nem etc are worth investing for long term gains. These are safer and more sought after. But you must look at the trends and take thorough analysis. Proper research is the key.

For day trading there are few interesting coins, collaborative investments and ICO tokens that are promising and worth investing. This has a little margin of risk always involved. But it is worth the effort.

As a rule, needless to say, you trade only that which you can afford to lose! Always be prepared for the worst and then plunge into trading. It is your call what you wish to do at the end of the day. Those 5000$ are best utilized with as I said earlier with thorough research.