I would buy a few and top up over time to smooth out the timing risk
Fundamentally though not a bad entry level
Since late November sub $600 is a good price to get in. If btc goes to $5k or even $2k this year the nominal difference between entry at $400 and $600 won't matter one bit to the lucky holder. On the other hand, depending on your finances it could make a big difference in how much btc you buy.