I would recommend BTC but your returns are not guaranteed due to the volatility of the market. If you want to go the ICO route make sure you can participate. I would be inclined to participate in ICO's that have soft & hard caps and have some sort of protection towards the investors in the case they don't meet such caps. Want to get your feet wet? Try looking for Bounties or Air Drops, great way to participate in ICO's without having to invest, just your time and effort. Many ways to get involved in the crypto world. Best of luck.