it is easy to assume that in the next few decades, we can easly achieve 10^30 / 10^40 (we've already gone past the point of cracking 2^128 or 128bits in a few seconds) and it will reach eventually 10^70+.
Are you sure? don't we start to hit the limits of the speed of light and how many atoms thin we can go on a chip, etc...
we can't just keep adding zeros like that... we hit physical limitations
Actually we can thanks to technological breaktrought, In classical computing , moving from Silicon to Graphen will help to keep us in the moor law for the two decades at least, the problem when will reach the point where quantum mechanics effect will start to manifest in terms of die shrink and this is one of the reason we are moving to Quantum computing where todays issue is the opposite