I am afraid we are not reading or watching the same news. US has stated that an invasion of Ukraine would have dire economic consequences, which in diplomatic terms is not equivalent at all to a green light. The fact that they are not sending tanks, submarines and the like does not mean that they are willing to have Russia have a go for free.
I'm from the EU, and sometimes the media here have slightly different interpretations of daily political events - and I've seen that many times when I've watched popular US news TV - although the differences aren't dramatic enough to create a completely contradictory way of thinking. After the Biden-Putin virtual meeting, the key thing highlighted in the EU media is that the US will not act militarily in the event that Russia attacks Ukraine, and that is the key thing in the whole story.
Here I completely agree with what @stompix wrote - no sanctions against Russia will harm them too much, which is more than evident from the not-so-distant past. Russia relies heavily on its political and economic ties with China and Iran, which the US cannot influence - and also keeps the EU in a position not to be harsh on them because Russia is their main source of gas and oil.
Regarding sending troops, you have to choose in a range of declarations... no clarity on that either, and changes by the day. The Biden admin is unlikely to survive an invasion of Ukraine politically IMHO.
The US would not put itself in a position of military conflict with a country that cannot be defeated in any way - unless someone thinks that Russia is a lighter opponent than Iraq or Afghanistan, which have proven to be evident military defeats of the US. Ukraine's only chance is to join NATO, but on the other hand, according to Putin, that would be like declaring war on Russia.
But none of that is the largest issue affecting markets, again, IMHO.
I would not agree, I would just quote @stompix
Of course, because when poeple lose jobs, lose money, or get killed the first thing they do is buy bitcoins.