The thing is, it was over 10 years ago and I don't remember a thing about it and I've searched most of my email and BitMax doesn't appear anywhere.
If you don’t remember anything about this, then should you by the example of buying those famous pizzas that would be worth millions today - but instead of regretting it, the same man celebrates every year with a new pizza.
OP wants to celebrate every year in the same way, but not pizza day, but “what did I spend those bitcoin on then?” 
P.S. All bitcoins you spent in the past or lost can't be returned back, no matter how much it costs now. Think not about what was lost, but about new opportunities (ways to get BTC).