There could be an advantage for some long time bitcoin holders who wish to hold profit at the current fiat price. If people did this 3 months ago, the could now sell and double their bitcoin. If people did this themselves, there would be tax implications that would be hard to hide. Using a service like this could be quicker and hide profits for a time, but you're also paying for the service.
One suggestion, instead of just fiat bonds, why not the option of gold and silver? Bonds give a set return, however most bitcoin users believe it's not worth the paper it's printed on. You could offer both and let them decide. I've actually converted some profit to gold and silver recently. There are several places that accept bitcoin.
There could be a small niche here for you, but it's not something I'm interested in at the moment. Best of luck.
Dear Elmwar,
Thanks for taking the time out to share your thoughts... It was plunge in prices that actually got us to work on this, coz we know of a lot of people who bought Bitcoin when it was $1000+ and now they have incurred a loss! Would have loved to start this service much earlier, however, we're hoping that it's better late than never

and would prove to be useful to at least the rest of the crowd who may want to make that investment now.
We are also working on launching gold and real - estate in the coming months, post our launch of bonds and deposits! Silver has not been on our list, but would definitely look into it..(+1 for the suggestion)

It's great to know that people in the community are opting for gold and silver as optional/ additional investments.
Thanks once again for writing here!
Regards
Team Invest Bitcoin