Can we get something to do with arena tokens?

I personally have about 600 on both my main, and my side but some people have gotten thousands and there kind of just sitting there.

For example, maybe 100 Arena tonens=50MB or something like that...or maybe even a small shop, just something we can do with them. Since there fairly easy to get, I wouldnt expect rare items for a cheap price but just something.

Maybe in the championshop, instead of using MB there is an option to use Arena Tokens...like a conversion.

Feel free to leave an idea i didnt say