All coins are now dying, what do you think? My in opinion
Bitcoin is always the safest investment. Your investment will grow and you will sleep comfortably at night. However, if you are interested in alt coin, i would say you have really to do your research and be prepared to constantly keep yourself updated. Alt coins are not as stable as btc, so in case the coins did not turn up as what is promised, you can change it.
Yeah, I would really feel comfortable sleeping at night knowing I can wake up and find my BTC worthless because 10 new coins such as Gold, Silver, Platinum, Copper and so on are forked out of it overnight.
BTC is heavily invested into because most of crypto new comers only heard about BTC and it is their entrance to crypto world. The fact is that it has no actual use besides being a pioneer in this industry, so it's just a matter of time people ditch BTC and ETH will be crowned as a new king.