What is the optimal size for the Block size to be increased to? (Choose up to 3)

The block size should be increased to a certain amount (or maybe it shouldn't be increased at all - it depends on how you are) and we must consider what the optimzl size increase is. Below are a bunch of numbers that you can pic how much bigger the blocks of the Bitcoin blockchain should go and be. Pick up to 4 so that we can get more numbers to run a more impressive regression against your voted preferences of size and determinism.