markovian

Don't know exactly how it is calculated (in the example I gave).

It is $53B for 2017, recorded in December 2017.

Anyone ?

Very difficult, because those companies are literally taking no fees, most of the fee is actually cashed in by the banks when they decide to approve a transaction. To compete with Visa and Mastercard you need to be the bank, lower the fees, and propose the same level of transaction performance. And that's a challenge.

There is some space in the cross-country payment market though, and some (a lot, actually) in the B2B payment market too.

What could we be able to manufacture in space in the next 15/20 years in your opinion?

How about a logistics company ?

It's actually one of the best solutions proposed here.

Thanks, very interesting. Could you develop steps 2 and 4?

In short, infrastructure. Where would you start?

By "bootstrap" I mean a way of self-financing part of the activities, finding a source of income quickly rather than relying solely on fundraising.

Raising money is not a problem, but I don't see myself getting involved in creating a business that requires billions and billions of dollars in financing before generating a single cent.