Can I make bread/pizza dough with only cricket flour and no wheat flour

I think you will be disappointed.

While a fantastic protein source, cricket flour does not contain the gluten proteins that make bread what it is. Therefore, bread made with cricket flour must get its structure somewhere else. The majority of recipes I can find are quickbreads which get their structure from added eggs blown up with baking soda. Dense and tender, not light and chewy.

Some recipes for things like cookie dough or standard bread use cricket flour as a protein enhancer but not a complete substitute for wheat flour.

If you are determined to make bread dough without wheat gluten then you will have to employ tricks from standard gluten-free recipes. Making your "bread" more like a cracker or adding gums of various types. Keep in mind that no gluten-free bread will come close to real bread and especially high protein pizza dough. They just can't get the light, crispy, chewy texture.

I am presuming you mean cricket POWDER not cricket FLOUR in your question.

There can be some confusion as a lot of companies sell their cricket powder as cricket flour but as it is 100% milled crickets it isn't a flour and shouldn't be labelled as a flour because it leads to this sort of confusion.

There are products on the market that are labelled as cricket flour that are a mixture of flour and cricket powder. If you are using one of these then use it the same way you would use normal flour.

If you have cricket powder then you can still use it but I would advise using it as a replacement of up to 20% of whatever flour you are using in the recipe.

Using 100% cricket powder can be done but its not advisable as cricket powder is expensive and using 100% on a pizza base that won't taste nice doesn't make sense. The base will be grainy in texture and depending on the species used it could have an overpowering earthy flavour that probably put you off using it in the future.

You could make "something" out of it.

It might even be good, but it won't be anything anybody would expect if you said you were making pizza.

Pizza crust is held together with gluten, which is something crickets don't have.

Pizza dough also rises, which is something crickets won't do. At least not when they're dead. 8-)

If you have a bunch of cricket flour, give it a try. It might even be tasty. You'll never know until you try.