if u invest in pre-chosen ico as per ur budget if the ico pays u 3 times or 10 times profit u can double ur btc profits thereafter. buy ico coins u can check in this website icorating.com
Agree, if you choose projects wisely then several x multiplier is doable, and in my opinion it's the best way to... buy more bitcoin

Yeah, for me doing ICOs is a way to multiplying my BTC stash, not fiat. I'm not interested in earning fiats because they are worthless in long term. Keep hodlin guys!