The only way to do that would be to dump any currency you have the moment he announces a pump... but people won't do that because it's not profitable.
The best thing to do is the buy along with Fontas right up to the point where he sets up the "wall", and then dump it before he does. Risky, but more profitable.
What is the purpose of setting up the wall though?
And how does it profit to sell before the wall is set up?