Earlier alts grew very well when bitcoin froze in place. And now they are just like bitcoin. Therefore, it is better to be in Bitcoin.
On a bull market mid/small alts will show better results in comparison to Bitcoin and top coins by market capitalization.
Not really, small alt tend to looks bullish because the market capitalization of the coin is quite low and still having immature market which means open to market manipulation by some sort of whales.
BTC is quite hard to be manipulated and requires so much resources and that's why the market movement is relatively slow.
actually the Bitcoin with Altcoin is the same, they have a development that continues to increase as time goes by that triggered their prices to continue to rise higher and expensive. so this has been an advantage to have and support for the development of future coins.
but I'm more open to the more Altcoin it comes in.