YES. If everything goes as expected, once the fork hits BTC should have a large correction (drop)
and alt coins (all the other coins other than Bitcoin) will likely spike. Especially the more established alt coins. Keep your Bitcoin until maybe 12 hours before the fork, maybe even 16 just to be safe, then buy altcoins with every bit of bitcoin you have. You don't want to miss the window or you will be stuck riding bitcoins value down, while everyone that jumps ship to alt coins gets to ride a new surge.
Right now Bitcoin is $7344.26, I think itll go higher closer to the fork then dip after.
Keep track of the timing of the fork here:
2x Countdown
And remember, the timers are sometimes off by hours because as we get closer to the forks more people start mining which clears blocks faster and speeds up the ETA. Im probably jumping ship on my Bitcoin into alts 36 hours before it just so I don't risk anything. Maybe even as early as 2 days.
You can buy partials of Bitcoin if thats what you want. So no amount is too low. Just make sure you scope the market properly. At this point with bitcoin set to take a big dip in 11 days, I would wait until then to buy if I were you. Depending on the size of the dip you might get to buy at a much better price.