Asking regarding ad

So, I obtained an ad in my Instagram feed relating to a crypto trading firm. It appear genuine like there 1k+ followers and constructive evaluation. Its initially ask us to provide them funding and they'll return us considerably greater than principle quantity like approach a lot. Like its lowest package deal is of 850 rs if I invest 850 rs by way of their buying and selling firm they'll present me with revenue or refund. But i am so confused