worst financial decision you ever made?

Thankfully I haven't made any single, substantial financial mistakes but I'd say like many, I've wasted plenty of money incrementally over the years (ie nights out, holidays, eating out, buying junk etc etc)

One thing in particular though that I stopped doing was entering into phone contracts though. In particular I mean the extortionate 'upgrade' packages where you pay €50-€60 a month over a 2 year period for a useless piece of sh1t of a phone you don't need. Much cheaper to buy a decent phone and do a €20 a month rolling contract!

I think my biggest mistake though is not educating myself on actually how money works. I cleared all my debts a few years ago and I've managed to build up over €60k in my current account which I know is moronic because it loses value by the day. Problem is i have no understanding of financial markets and even less trust in people who manage money and/or financial institutions.

Any advise on a decent finance/investment course would be greatly appreciated, I want to have some understanding of finance before pints hit €100 and standard houses hit €1m+ 😂

Years ago with my first own car, must have been, 22 or 23 yrs old in 2001 to 2002, I reversed into someone in a shopping car park and damaged one of their rear lights. nothing big

No arguments etc just exchanged names and numbers, I worked at the shopping center so I used that as security too. Damage cost me £500 (obviously inflated) which I paid for with an overdraft on my bank account. I didn't want to go via insurance as a first time driver it was nearly £1k a year back then.

That overdraft stuck with me for years and years due to my own poor money management and been poorly paid and I'd say it cost me more than any increase in insurance over the same period

Lesson of the story insurance is there for a reason use it!!

Loaned someone 300 euro and never got it back.