Whether it makes sense to buy btc today and wait for rise of the course? (maybe it will takes many years)
Like it was at the beginning of the bitcoin.
let me remind you in 2013 it was mostly below $100
in the later half of 2014 it will most likely be permanently above $1000
in 2015 it will probably pass the point of $10000 (either permanently or temporarily).
after that, it will depend a little. but i don't think it's unlikely to see even coins worth over a million before 2020