"If I look for a job in the future i would be applying mostly on my degree’s strength and grades and with references from former teachers."
I think that approach is completely incorrect. You need to focus much more on the fact that you have 10 years of experience as an entrepreneur. Employers will want to know what you've accomplished in 10 years. They will want to know why you decided to "go it alone". The will want to know if you are "gutsy" enough to work for them in a challenging capacity.
When they ask you where your degree is from, tell them, but you don't have to volunteer that the institution is winking out of existence. If they find out on their own, demonstrate to them that you're fully aware of the situation and the reasons for the institution's troubles. Be knowledgeable and non-defeatist. They'll respect that. You're not to blame for the school's fall. You're not the one who went bankrupt.
In the meantime, make sure you get any paperwork from the school that you need. Be proactive about this...not defeatist. This isn't your fault. And for God's sake, don't delve into a pity-party with any potential employer about how you went to a "lower tier" school because you wanted to "stand out". That's completely ridiculous. Trust me. Don't go that route.