Is Bitcoin's Price Being Suppressed Like Gold?

No

Gold and Silver prices are manipulated through derivatives. Basically, paper ownership. You purchase gold and/or silver through these derivatives and receive a "certificate" that says how much gold/silver you own. But, you don't actually have the gold or silver, and many times the people giving you the certificate don't have the gold or silver either. It's all based on futures. So, what tends to happen is we have an artificial supply of gold/silver that doesn't exist. If for instance, everybody cashed in their certificates at the same time and others refused to buy the derivatives, gold/silver prices would squeeze cataclysmically, because the demand would trump the actual physical supply.

That isn't possible with Cryptocurrency. Cryptocurrency is driven by supply and demand. The manipulation in crypto goes two ways. If developers and whales sell large portions of their holdings, then you'll see a dip in the market. If they buy large holdings, you'll see a bump. Also, developers can "burn" large quantities of a cryptos' supply, which can increase the price because it lowers the supply.

Bitcoin can be suppressed but not the same way as gold.