it will always be a good time for as long as bitcoin hasn't reached it's full market potential. Don't listen to people who tell you you shouldn't buy because the price is too high - they've been saying that since january. Also there's no need to fear buying in an all-time-high, and there's no reason to wait for a dip. If you try doing that, the price may simply go up and never come back to where you were aiming to buy. And you'll be the fool looking for the next dip (which may actually be higher than today's high)

the only "analysis" that I take seriously is: will cryptocurrency be extremely important for mankind in the future? If so, buy some whenever you have the money. And screw the short term variations.