How dumb would this be

So I've read that we are close to a bottom and this may be an opportunity. I have this 20k bike (my currency, not dollars) I want to buy but i only have 7k and realistically i would have to save for around 2 years to get the other 13k i need. If I buy 7k worth of bitcoin when it hits the 55k mark, and sell in around 2 years, what are the chances that it would be a good move? Is it worth the risk or is there a way smarter choice?