Asking regarding ad

So, I received an advert in my Instagram feed relating to a crypto buying and selling firm. It appear authentic like there 1k+ followers and constructive evaluation. Its initially ask us to offer them investment and they'll return us significantly larger than precept amount like method much. Like its lowest package deal is of 850 rs if I invest 850 rs by way of their trading firm they'll provide me with profit or refund. However i'm so confused