This is good sum for investment, especialy for trading. It's risky but the chances for profit are good. Since the price is very good at the moment and it's still climbing up just holding Bitcoins for longer time it's also not the bad idea. So, it depends are you prone to some risk and higher profit or do you want something smaller but more secure.
The hype in btc is fucking big. And this will up until etf give us a answer. Then we will know, if is time to sell and buy cheap, or buy more and more
For now there is not way to know that what will be the price of bitcoin in the future or this coming days or months.. the price is too high right now as you said.. and i think if you really want to make a profit just but a small amount or buy bitcoins right now but not buy all and maybe the price will go down..