Well as years and years passes by we might see slower increase and this comes because market cap raises. Many developments are happening around the space and last December bubble just increased the adoption in terms of devs and companies who are trying to build something useful. Of course that not every company will be successful and not every alt BUT with much happening behind the scenes crypto will come stronger with more infrastructure build for the ultimate goal to be more used as a payment. You have Whales in any industry and you have people who manipulate even stock markets, crypto is just easier because of its marketcap currently to manipulate but lets be honest all markets are prone to manipulation.