Time to invest? Bitcoin tops the $5,000 mark
In short trading? No its not the best time to buy bitcoin on its peak price or hyped price knowing that the cause of such increase because on the upcoming bitcoin gold event but if you do buy bitcoins for the sake of free bitcoin gold then its still possible but would be somehow risky if you wont able to get out on the high price because I do really have a doubt that the price will surely dip again once bitcoin gold have been accumulated by its users but if we do talk for long term then anytime would be a best buy considering price is still young.
Bitcoin is rising and alts are going down, as most of the people are selling alts to buy bitcoin, such high demand causes the price increase. If the people (were holding alts before) will realize the extra bitcoin gold after the fork, they will start to sell bitcoin to buy back alts, so price will decrease a bit. For long term holders it's not a problem, but if somebody wants to buy the very first bitcoin, maybe this is not the perfect timing...