Realise how you grew, and how the money changed and is going to change your life for your next personal/professional experiences.

Be proud of yourself.

Interesting journey. What makes you try again and again?

More or less everything, all depends on you.

Take a few days off.

An option you didn’t mention: if the business is profitable, why not just maintaining it and cash out money regularly ?

900k£ is a large amount of money, but definitely not enough for you to stop working. What do you have in mind if you sell the business ? Long vacation and slow down in life, another business etc… At the end it’s more about the life you want than just money.