Best course is just to ignore them - Bitcoin is for everyone and you can’t stop people buying and selling bitcoin however they choose - even if to make a quick buck.

Here’s the thing though- one of two things tends to happen to people who think they can trade bitcoin -

a) the price action causes the most pain possible to the most amount of people. Let’s go to $10k and see who can stand it there- it could happen and would shake out a huge number of people believing in some form of 4 year cycle logic.

b) they make some money and get out. And then, a few years down the line they wonder if they missed something more significant, since they may never own that amount of bitcoin again as they sold before. Remember- plenty of genius’s rode Bitcoin from $50 to $500, etc