the best time ? ithink it will be delayed this time just wait till the bitcoin price really small like $600 then invest all your money in bitcoin im pretty sure that you could get a multiple of earnings after a years all you need is patience and you need guts in order to take the risk. bitcoin is not that risky because while waiting till the bitcoin price increase you could play some gambling or maybe do trading addition in your earning.
but to me i think if you want to wait or this price, i think then you can only wait and the price of bitcoin is not coming down to this price, i think it is still better to trade bitcoin in the present price as you will never find any opportunity to trade bitcoin even in this price in future.
Every time is good to invest in Bitcoins because Bitcoins appreciates more and more for every 3 months now. I even read some articles online saying, bitcoin value will continue to rise up to nearly $3k said by the BitPay Founder by the end of the year.
Based on so many analysis, to me investing on altcoins is also a waste of time because Bitcoins dominates the mine of the masses. so must people think of buying bitcoins rather than the altcoin that why the value of bitcoins will continue to grow higher and higher due to the high demand of BTC from the people.
Thank you.