It rings alarm-bells all over the place - everything from social-links that don't link to anything, to the stock-photo of the woman in the header, to the admonitions for "investment" (avec typos) to the bad HTML under the hood to...
... New Bond Street? Sorry? I mean London's a funny place... it takes all sorts, but New Bond Street is where all the designer-clothes shops are, and anyone who can afford an office there, can afford a web-designer...
... except, that in London there are these agencies that rent out mailboxes in relatively salubrious neighborhoods, to businesses who are (more often than not) somewhat south of salubrious.
And if you google the address, you get (as you'd expect) a couple of clothes shops, but also a couple of Nigerian-style scams on every page.
I've been wrong about these things before. But... I know what open-source projects look like, and I wouldn't touch a bitcoin API with a bargepole unless it was open-source... and this just has "wrong" written all over it.
If I had to make a cynical guess, I'd say it's someone who's written a description of an API and is fishing for investment money... and just wants to get rich without really knowing what they're doing.