Some people might find it useful, but what's the point of using multiple extension have same function (find good gas price/cryptocurrency price tracker)? It's like installing uBlock and AdBlock altogether.
I am not using all of them of course, but I tried them all and chose one that use least memory and I can check source code
Someone else may like alternative extension more.
Actually I only have few extensions installed for everyday use, and one is BTC price ticker, other is for ethereum GAS, metamask, then BPIP extension, and I use uBlock origin but it is not crypto related.
I added note 'alternative' now.