With some coins going up 50% or even l00% in a day or few days or in a week... any reason why bitcoin doesn't do that almost ever? Look at binance coin and many of those other coins that are literally doubling in a week. Now the btc dominance is going so low. And even when btc goes up... you don't ever see it going up that much percent in a week. I mean... its rare to see bitcoin say go up 50% in a week yet tons of altcoins do it.
Altcoins you're talking about probably have low market capitalization. So it's way easier for them to be pumped and dumped, and thus they're more volatile. If Bitcoin goes up 50%, it means that there will be an additional $500 billion added to its market capitalization. This is just a crazy amount of money, so no wonder Bitcoin is way more stable. But Bitcoin did go up by 600% in one year, so I think it's still a very impressive performance. Altcoins can be better for fast profits, but it's also very easy to lose a lot with them. Bitcoin provides profits over a longer period of time, but the risks of its price going rapidly down are also lower than with altcoins.