There are numerous reasons why invesment in Bitcoin is better than some other cryptos.
1. Most cryptos are shit coins created by greedy individuals
2. Bitcoin have volume and liquidity which is not the case with may other cryptos
3. There is low chances of pump and dump in Bitcoin as is common with with other coins
4. Bitcoin already have an established structure and vision, some other coins are still using trial by error method.
Exactly! I agree with this. There is no real intrinsic backing for a lot of these coins, just a bunch of bros in their basements with computers who think they can get rich quick. Bitcoin is not so vulnerable to manipulation so it cannot be pumped and dumped so easily. The large volume makes it more robust inevitably so it can stand on its own without swinging violently from top to bottom.
Hopefully we'll see some more coins with structure and vision to come. There are some honest investors out there who want to use the concept for doing good.