If Russia is going to invade, the dead of winter is the time to do it. Europe will be needing Russian gas to stay warm, so they will not be anxious about getting in the way of any invasion.
It will be within the next 4-6 weeks, or they need to wait a year, and next year may be too late if Ukraine is already in NATO.
So on this one, I could believe Biden got something right. Or whomever is spoon feeding him these statements. Putin should be taken seriously, but they only take the threat of invasion seriously, and not the reason why Putin has huge concerns about Ukraine.
Forget NATO and US. America is going bankrupt and the DOD is injecting their soldiers with a bioweapon. In a year we won't be fighting any wars. In 2 to 3 years we will have Nationwide Food riots and soon thereafter be fighting a Civil War.