you are just posting random stuff but ok i'll bite!

bitcoin to 30K in 3 years: i don't know. it is hard to say. if we continue on this path upwards and if the scaling debates end soon within reasonable time we can see a much faster rise. in 3 years something around 8K is more logical in my opinion.

ETH: i highly doubt it. the pumping team has proven to be very powerful but don't forget that currently there are 90+ million coins available  and in 3 years there will be 400 million coins in circulation (more than 27000 ETH is created daily!!!) and nobody can pump a coin with that much supply to anything above 1-10 dollar. look at doge if you don't believe me.
and if they finally cap it and change the POW it will probably die after a much shorter time because many will dump and leave it since it is no longer profitable for them.

IOTA: i don't see any reason for this coin to go anywhere! it seems to be very new so it is not easy to say anything about it. and each year there is always a new up and coming coin that takes the altcoin market by surprise and that was ETH this year and next year will be another one.