Since Blockstream limited the addition of sidechains and restricted outside sidechains being added to the BTC blockchain, they stunted Bitcoins growth and scalability, all to the benefit going to Blockstream.
The lightning network is a sidechain run by Blockstream which contracts mining companies, and Blockstream takes a huge cut from the mining/sending fees. The more people using Bitcoin, the higher the fees, and the more the mempool gets clogged; all things terrible for the average user but great for Blockstream and Whale investors. Over time Blockstream has accumulated a massive amount of BTC through mining fees, which they have been stockpiling for years.
High fees lock BTC away from being used, as, if you can't afford the fee you can't send it... Fees and send times will continue to rise with new investors buying for the first time, so if the sending fee becomes $1000 for example, if you have $999 worth of BTC you wouldn't be able to send it to any wallet let alone sell it. As fees increase it will adversely lowers Bitcoin's supply, driving the price up and up.
So When will it stop going up? My best guess is when the media and institutional hype dies down, and were currently peaking in hype buying, meaning soon.
In my opinion the price and future of Bitcoin is currently in the whims Blockstream, It's not a question of if, but when they dump.
I hope it doesn't turn out too horrible for average investors.