What is valas? Is that some non-English term for fiat and traditional currencies or what are we talking about?

I think that what OP was asking with this part is whether owning a huge chunk of Bitcoin would give that individual enough power to move prices according to their will. The short answer is no. The long answer is that collusions are certainly possible if it suits the interests of all involved parties, particularly if that interest is making even more money.

But a few whales can't do much even if they had ulterior motives. You would need to create a domino effect where your actions cause a significant part of the holders to either dump or buy more if you want the market to go a certain direction. It's a bit easier If you have big media behind your back that scares the unknowing population with bitcoin bans, the death of bitcoin, strict regulation, and more harmful stories.