of course I will go with altcoins investment because the main reason behind this factor is that in ICo we can face scan but in case of investment in Bitcoin there is no chance of scam or we can say that very very small chance of scam .
Here I don't mean that every ICO is scam but we can't ignore this factor that most of the ICOs are scam and they came only to make profit by taking the investment from innocent investors .
But here it always remain better to buy a coin which exists in real and has its official wallet , I mena sometimes we buy a token coin and that get listed in a exchange and after that when market of the coin get down then in that case we will face the problem of the delist because in that case chances to delist the coin increases , so here we can say that we should make ourself safe by making investment in those coins which are in actual coin , so that we can transfer them in a wallet in any case of the emergency .
And also we can see that there are lots of ICOs that results into guinuine but after the launch of the coin at exchange the price get dumped badly, and  I think that comes a better chance for us to make investment in that coin Because we can buy those coins at low price then what was the ICO price , and this thing happened many times , so we can take changed to make profit even after the ICO end with more safety .