Try to research some projects below around or below a 100 million marketcap if you can't find anything you think is worthy of investment then just stick to top 15 or something. 200k is a lot of money and I don't think you should be asking a forum for investment advice. Perhaps its better if you find yourself a mentor or a crypto hedge fund. And maybe take 10% of that 200k to invest in altcoins yourself, you can lose it all in the blink of an eye.

Best is to buy when everything's red, try to get in the low of solid projects.