I have a few coins I like to invest in.

BTC is always a good investment, though the transaction costs and confirmation times are a bit of a bummer. It's why I like BTC to either HODL for a long time, or simply to buy altcoins with.

BCH is a coin I like. I like it because of their low transaction costs and high confirmation speeds, and the objective of the coin is to be usable for everyday purchases, someting BTC isn't that great at.

I like LTC because it's the "silver standard" (to BTC's "gold standard") of the cryptocurrency world, so people who have less money are more likely to grab LTC instead of BTC (same way people with less money tend to grab silver instead of gold). This can be very beneficial for speculation. In addition, there's a rumor that LTC will be used in FaceBook's send money feature, making it even easier to send money to someone. If the rumor's true, then LTC will shoot up in price.

A fourth coin I really like is XSPEC (SpectreCoin). It's a solid privacy coin and, relative to the price of other privacy coins (some of which have developed no privacy features), it's extremely underpriced. I expect the coin to rise in price significantly as the marketplace becomes more aware of the coin and how cheap it is relative to other privacy coins, as well as its high quality technology.