But is that the definition of a free market enterprise? If it's legal, which it is, and you can create it, lots of people have, then its free markets at its best. If you (or anyone) can create a bot that does "better" then the current bots on the various exchanges, they would do it and profit from it. The hard part is not creating the bot itself, it can be done, the "hard" part is having enough capital to support both sides of the walls while turning enough profit without the fees building up.
....and if you have the capital, then you are free to piss over all other market participants.
Right now for example, the market clearly wants to go down, yet it is being brutally nailed up by bot trading refusing to let it sink to where it wants to sink to across all USD exchanges. Never since I started paying close attention has the spot price manipulation been so blatant and translated on the charts as so mechanical.
In whose benefit is this being done? And incase you are pleased that the price is being artificially propped up in this way, what do you think could happen when/if such artificial supports were to be suddenly removed. Would it be reasonable to consider that we may have a more brutal sell-off than we otherwise might have had. Same thing can happen when the bot trading is keeping spot price down preventing a bull run from taking off and the flood gates are then released resulting in a much more voracious (and volatile) upsurge than would have otherwise occurred.
Either direction, the owners of the bots will be clearly be best positioned to benefit from the consequences of the market disturbances that they cause.