Etfs get terminated for many reason however most of them are due to lack of demand. There are way too many of these Bitcoin etfs so I predict in a year or two the 2-3 with the least amount of AUM will probably just close down.
It is exactly what's going on with approved Bitcoin Spot ETFs. Two leaders (exclude Grayscale) are BlackRock and Fidelity, and bottom ones have very few demands.
In 2 or 3 more years, bottom ones with little demands will have to self close their Bitcoin Spot ETFs and their customers will switch to top ones like Grayscale, BlackRock, Fidelity, ARK and Invesco.
Dont think blackrocks or fidelity will however close down anytime soon since it has a large AUM and will be around for years. Remeber that Inverse Kramer ETF that launched a few years back, it closed down last week due to lack of demand. It just happens with etfs.
I expect they will bring more capital to Bitcoin market because they are very big capital management institutions and total capital they are managing in Bitcoin Spot ETFs are very small compare to total assets values in their management portfolios now.