Bitcoin price extrapolated over the next 4 years

This is what a Bitcoin Ethereum, Monero, Nem and Stratis would look like if the current rate of growth over the last two years was extrapolated over the next four years in a logarithmic chart.

Obviously don't use this as investment advice and it no doubt will not play out like this but it is interesting to see. Where do you think the price will go over the next two or three years?

It's also interesting to point out that Monero has a fairly straight line on the increase on the semi log scale compared to Bitcoin and the other cryptocurrencies.