You sold car owned by your girlfriend and you will hold ethereum until 2028, it is easy with other peoples money, have you consider to sell your car to buy ethereum? It is cheaper than it was when you bought it, would you buy it now too?
Of course he does not have a car that is why he sold his girlfriends car and I think for investment, you should not sell the stuff you own for use and rather the capital you can have access to the facilities available in the market.