Sorry OP I can't help replying with some exasperation here. If you genuinely don't know what 2008/9 was like, there's copious literature about it. The causes were multi-faceted and grew over a long time (the 'boom') with the 'bust' happening very rapidly in some cases, and then continuing for many years. And as PPs have said, many people have continued to suffer since.
In my case, in early 2009, I worked in a senior professional job in a consultancy connected to the building sector; I was pregnant with my second child in a difficult and failing marriage. I lost my job overnight, with no warning (it was early in the crash period). I am not the most unlucky of people - I held onto my house; ultimately my marriage ended (we had 3 children by then), and I spent nearly 3 years trying and failing to get work, on my own with very small children and no support. It was truly truly awful. I will never forget it. I eventually got contract positions, thankfully, and exactly 9 years after I'd lost my job I finally had a permanent public sector role which is secure.
In this current crisis, I am so so sorry for those businesses that will feel an immediate impact, and recognise how lucky I am to have a salary, that I can continue to pay by childminder while in self-isolation (Ireland) so that she is also secure, as I'm so aware this is not the case for many.
But this is an ENTIRELY different situation. Clearly more grave, as it is a public health crisis and people are very sick, and some are dying. From a financial point of view, yes, it will affect all economies. But it's not caused by an overheating of the market that will take ages to rectify. Based on modelling, there will be a return to (some sort of) normality) by the summer. Many people will not have been spending (as they are isolated) but once they can, they will again, as they have the money.
In Ireland, approaches are being put in place to cushion this short-term blow; for example, aid from Government, mortgage moratoriums, freezes on certain payments and taxes.
You cannot compare the 2 events, at all.
There is no point in getting hysterical about losing all your money - why would that happen? It never happened in 2009 either - people lost money on investments not the actual cash in their bank.
This is another indication of how poorly UK authorities are handling the situation; I'm not saying Ireland has all the answers but because there is complete clarity about working arrangements, school arrangements and social interaction, people are already finding a new way to work, where possible, some people are coming up with innovative solutions and there is some support for those adversely affected by the events, which is awful. But it will be short-lived (in relative terms, not of course, if you are in the middle of it, I know) and can be overcome in some months.
Finally, the banking systems overall are much more robust than they were in the 2000s. Thank Goodness.