Asking regarding ad

So, I obtained an ad in my Instagram feed relating to a crypto trading company. It appear authentic like there 1k+ followers and constructive assessment. Its initially ask us to provide them investment and they'll return us significantly larger than precept amount like means a lot. Like its lowest package deal is of 850 rs if I make investments 850 rs by way of their buying and selling company they may present me with revenue or refund. However i am so confused