People want to become profitable from cryptocurrency. Some people want secure their fund cause it needs to take higher risk for higher gain that's why btc is good to be hold. Might be give you Small profit but safe. And altcoins are risky. altcoins will give you much profit. A multiple time higher than bitcoin and that's why people jump to altcoin investment but they should keep it in mind that altcoins can trun into shitcoin anytime. So make diversification, buy both btc and good altcoins for best deal
If you want to invest in cryptocurrency, you should definitely choose Bitcoin first. You can invest in Bitcoin as well as Altcoins. But try to invest mostly in bitcoins, invest a small portion in altcoins. It's not that investing in bitcoins can't earn high profits, if you can patiently hold bitcoins for a long time, you can definitely earn huge profits. Investing in altcoins is risky, holding altcoins for a long time becomes risky. Invest in Bitcoin as well as invest in the top altcoins on the market.
Top altcoins market has been soaring for years but shrunken down other projects that has no concrete support from community. That's why we see the public diverted their funds towards Bitcoin as well as ethereum because these coins has proven itself with respect to value and efficiency. Investment is really a serious matter about money making, profit is the very goal for all our hardwork and patience.