So guys, what do you think about investing in different icos? I think it's a good idea. We never know which will take the lead in the future. Please help me and give me good suggestions!
Well firstly the title of the tread implies a complete different discussion topic compared to your question here. But i will answer both for you.
As for an Altcoin crossing the BTC market cap i would think that it is extremely unlikely. BTC just has to much of a network effect to displace right now. The community is extremely large and it probably the only coin rigth now that is truly decentralized along with a very large token distribution ( Ether might be the one exception here).
BTC has survived countless attack before and is most resilient to survive the countless attack to come in the future. I would also suggest looking at the hash power of some of the platform coins here, you will soon find that many of them are extremely vulnerable to 51% attacks right now, ( very easy and cheap to do so) there was a wave of such attacks going about last month ( they hit verge twice, Bitcoin gold as well as a few others) but they seem to have gone quiet right now. BCH as well seems to be on a death spiral right now with hash power depleting very quickly, another overlooked problem with BCH here is that with so many empty blovks being mined so quickly they will be hitting the miner fee reduction time frame much sooner than the real chain. When this happens lower mining rewards couple with low transaction fees as well as low price compared to the BTC chain will mean almost no rationale miner will want to mine it.
Seem to have drifted into a BCH rant here.
Anyways, i just dont think any alt can really displace BTC, as far as ICO's are concerned well i would strongly suggest you tread with caution.