Bitcoin has better infrastructure, much more fame, and much bigger community, is deflationary.
Why not diversify if you're not sure?
"Any ICO" is not a bad advice, just buy a few different ones. They seem to grow exponentially.
Track - most likely yes, unless you get some really obscure ICO. There are many free portfolio trackers, I use https://coin.fyi
"I'd recommend buying BTC, selling the swap on www.bitmex.com and getting the passive return in USD from the swap rate
..Or you could buy some BTC, some ETH, an 5-7 other coins in some ratio, set up all the wallets for them, and hold them in cold storage for 5 years you have a decent chance of out-performing the swap yield
you could buy 10% BTC, 10% ETH, 15% LTC, 15% ETC, 10% XMR, 10% of 4 others .. thing is that portfolio could go down 50% or 70% before it goes up 300%...
you could also have that portfolio and have 40% in dollarized BTC..
having 40% hedged and earning say 30% a year really helps to limit your downside and it also means you have dry powder to buy the next big down-turn.
"
are you suggesting that any ico has the same ROI potential?
https://www.cnbc.com/2017/08/09/initial-coin-offerings-surpa...