The best way is to participate in campaigns to earn free tokens. If you do so, your investment will not be at risk. There are many ways of earning free tokens like bounty campaigns, airdrops or mining. Or if you want to invest in IEO, you should choose trusted project and then go for it. Investing in pre ICO or ICO in a good project is also profitable.
yes it is free, but most of them is just a shit. it just wastes your precious time
that's why many people choose to spend their money and get back good amount (with risk ofc)
Buying in IEO is good, as long as you buy in Binance Launchpad. most of them is a successful project
I observe it and then I'd invest my money to it.