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Some people have been mentioning how I talked about a fairly low amount (a few millions) to manipulate Bitcoin so figure here might be a good place to clarify. It becomes easier to manipulate Bitcoin during sell offs and pumps because the order book tends to become thinner, which is the opportune situation for wealthy individuals (as proven with the Bitcoin Cash pump when it was listed on GDAX). 40 Bitcoin would probably be enough to do some damage if you used it properly while order books were relatively thin. But the big players tend to have over 100 plus an equally sizable amount in cash.

Crypto market is not that huge compared to stocks or Forex. Even 40.000.000 $ can turn it all red or green. Besides there are a lot of small not institutional investors who are very easy to panic-sell or FOMO-buy. Once the crypto market gets mature and bigger in volume it will become less volatile. But the time to strike big is now.