Hello
I decided to invest around 2400$ for a long term investment in BTC but the price is currently high. Should I buy now or I wait for the fork when price probably go down ? (I will invest in etoro so no exta coins will be obtained after the fork)
Since you want to go for the long term, and you have only those funds to invest I think the best option is to wait after the fork. Although the price might still probably increase a little more, since the fork is only around the 15th November, it could also just remain stable for a while, since it already had a large run, because of the recent financial news. There will most likely be some kind of correction of the price, after the fork, so that should be the best option to get more BTC from your current bankroll.
After that, I would jut keep holding no matter what, because a lot of money should go into BTC in 2018.