Helbiz have announced that Hitbtc will list Helbiz very soon. I think Hitbtc is the exchange which they mentioned "one of the 10 biggest exchanges."
İf Hitbtc is an extra one this is a good news.
By the way one of the 3 biggest is coming soon.
Hitbtc is an extra one, probably next they will announce bittrex, because they said top 10 exchange is partner of Jaxx, two possibilities coinbase or bittrex. Imo it will be bittrex. More important than exchanges they will be launching the product in July. Real life product will take the price to a really higher level than exchanges. The team seems to work really well.