If you ask me yes it is very good decision if you will buy 1 bitcoin today and hold it for long term investment because you can see now that the price is slowly rising from its cheap price last year or even last month so why not to invest at bitcoin and try to hold it for long term for at least 4 years and after that you will decide whether you will sell it or not because i believe that after 4 years the price of bitcoin will be stable at $$$$ price 
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yeah I also agree that this day may be a better buy than you wait after halving? because maybe you'll be left behind in the train dude. buy today you have the opportunity to sell at the current high price of halving come might occur there? .Its always good to buy bitcoin and save it for future as like any other investments there is no lock in period in bitcoin you have freedom to withdraw with zero penalty fees.
Even though the price seems high at 700 it's a good time if you can hold your coins for 2 years minimum.
If you got money you will need to be ready for some kind of emergency then my advice is to don't do it.
I will prefer to hold if for at least next 5 years as I believe in holding for long term, so even if I see higher price at halving I will prefer not to sell and save it for future.