At this point can SoftBank make winners in silicon valley by pouring money on companies and having the other companies they have invested in support each other

At this point can SoftBank make winners in silicon valley by pouring money on companies and having the other companies they have invested in support each other by using each others products? Is this good/bad for the silicon valley ecosystem? Is there a point at which massive investment groups get treated as monoplies and regulated? Uber and Grab (both SoftBank investments) merged into one in the Philippines: https://www.bloomberg.com/news/articles/2018-03-26/grab-vanquishes-uber-with-local-strategy-billions-from-softbank https://www.bloomberg.com/news/articles/2018-03-26/grab-vanq...