We should also not compare the value movement of altcoins to bitcoin because no matter which angle we look at, they still follow the value movement of the mother coin which is bitcoin. As you mentioned, some altcoins can be exceeded the price of BTC, so it's up to you where you want to invest. If you want to make a lot of money here in crypto, there are many different ways to make a profit here, it can be via signature campaign, investment and trading so it's up to you which one you are better at.
Altcoins always follow the movement of bitcoin and increasing and decreasing according to it but this time bitcoin is reduced much more as compared to that of altcoins. Altcoins are also profitable but reduce the risk by searching well before investment and diversify if you can.
There are lots of other opportunities in crypto too beside investment like you can be a part of Signature campaign, as well as you can buy and sell tokens shortly in case of trading but I think investment does not require too much active mind but trading requires more energy, more knowledge and more strategies to apply and is more risky than investment.