20k$ dumped to 6K$ was difficult but happened, 6k$ to 500$ is very easy soon will be worthless, So Why Some People Dont Believe BTC is SCAM?
Those people knew the truth about how bitcoins is very profitable and maybe they are earning a huge amount of profit through trading in the market which they can actually use to sustain their daily needs.
Those are the real believers of bitcoin and they knew that bitcoin is not a scam so they continue to invest with it. Its normal to pump and dump the market, and those people think bitcoin is a scam better to stay away from this market.