DEX will still having a hard time to grow, people now are trusting more on centralized exchange, and despite the fact that there is a halving schedule this year but we can't say that bitcoin will rise due to the pandemic.
When you created this post, you don't consider other bad factors such as this pandemic, so I'm wondering maybe you'll change your prediction now that we are seeing how our economy has been struggling.
From what I have assessed about DEX, it is only a secondary trading tool. This means that when CEXs encounter problems, DEX will be a backup plan. because even Binance DEX does not make me happy about the trading volume and trading tool there. There is no stop, no big volume and the price is always very big difference. You may even pay more fees when using CEX. so I still do not appreciate DEX for the time being.
The "Binance DEX" is NOT a real DEX, don't be fooled here, lol.
Stakenet's new Lightning Network compatible DEX will solve many of the problems we've seen with DEX's today. One of problems is "speed", you can trade INSTANTLY over the Lightning Network, which is pretty cool. More over is the DEX itself powered by a "DEX Aggregator" that will pull order books from other DEX's through API's meaning it will add a BUNCH of liquidity to the DEX itself, benefitting everyone.
Do your own research, but this is by far the best DEX out there.