What is everyone's thoughts on Polkadot?

I have been watching for a while after hearing good things but the price does not seem to be dropping much.

I have seen some say it can ready $500 or even $1000 but how long is this likely to take?

Current price is $26 , is now a good time to start investing or is it likely to drop to around $20? I want to buy and hold for a few years at least.