In 10 years time I think cryptocurrencies will be adopted in every segment of economy and Bitcoin will cost at least 1 Million dollars. The whole world will be digitalized and robots will do a lot of things that we are doing right now.
you are right, bitcoin requires 3 confirmations to ship and takes 15 minutes for 1 confirmation but I think there are still many rivals in terms of transaction speed in the next 10 years.