It's unlikely that any person or thing will be the reason for a bull run. The acceptance and legalization in different regions can give a pump in my opinion.
How can you be so sure? Did you see what some dose of fear of Tether going bust did to the market? And this wasn't even based on the news, just on the fact that there were some withdrawal delays on Bitfinex and that it had some bank problems. If the news got confirmed and we followed the same pattern we could easily break the bearish trendline and go to 8k USD. In 2013 Willy bot has managed to push the prices up by at least 100% (I'm being modest here). Imagine what would happen if a company like Apple said they're going to endorse BTC and permanently add a wallet to every iOS based device.