Very easy and you can mitigate the market risks. No tax and you still have exposure to upside. They have a third party do proof-of-reserves. Worth looking into Bazza.
I think GBP is new, I had an account already and used it to b2x last bull. One thing to be mindful of is that a drop like the one in 2020ish (end of last bull) can completely wreck you. They have a reasonable LTV but Bitcoin can and will eat your lunch if it wants to. It scares people like my friend. It set me back and humbled me too. I think timing is important but it's the inverse of "selling high"... you should stick to bear markets and maybe the beginning of a bull run but never in the middle of it.
Fortunately bull runs are short lived so you are inconvenienced only a little of the time and you can probably just end the loan early to avoid issues. Fyi, maybe its changed, but another thing that killed me was that the terms did not allow you to pay down the loan partially... it was close the loan or keep it open or add more collateral. No paying down some of the debt to improve the LTV.