Which coin gave you more return? Investment on Alts or ICOs or BTC? I have been holding BTC for a long time and I want to expand my portfolio. I have ETH holdings as well. I tried trading with many coins but never made of it. The reason I don't want to invest on alts is that those companies will create FOMO and make people buy and after buying you will be rekted.
if you want to expand your portfolio, well btc is still a good choice than investing Alts and ICO. But in my opinion alts is a good source as well and you can obtain a huge profits on it but depends on the potential of coins which coin that will make a good return after long season .and i think it's good to hold an alt coins that affected on bitcoin growth rate as well to assure you can multiply your profits when the market stabilize.