Not right now, price is so high.
Definitely today is not a the right time to buy bitcoin if you are thinking to invest 1 bitcoin and you don't have something to hold to.
But if you already have bitcoin that you holds it is a very good thing to invest in a long term investment with that 1 btc.
No I think you are wrong, if you are a long term investor then you can still afford to buy now, as in future price will be too high and will not be easy to buy bitcoins.
Yes, I think you are correct. It is the perfect time to invest in BTC. We can see that the rate of BTC is increasing daily. And its clear that it will be more in next few years. If we wait thinking that the rate will decrease and we buy BTC then its foolish. Its time to invest on BTC cause future of BTC is bright enough to make you rich.