I can tell You for sure I wouldn`t buy anything.
Not even 0.001 BTC.
But I would buy a lot of altcoins (on this prices) and short BTC on Bitmex and CBOE.
That would be very good spread trade opportunity.
Only problem would be rolling all those short contracts on CBOE.
By that time even altcoins would be very pricey and it would be like what btc is selling at this point around 8k so would be the altcoins prices or may be more costly. So if you think buying altcoin at that rate is good idea in that way you should be buying a lot of btc at present to make a fortune for yourself.