Is this an right time to buy hifi?

I want to second what mapman said above--you can get very good sound these days for not a lot of money.  amplifier technology is such that there is essentially no audible distortion on any decent SS amp.  speaker technology has trickled down to lower cost speakers (though you still have to get something better and more expensive than sonos ones, say).   So if you're new to building a system, do your HW and you will get a great system for not a lot of money.  How do I square what I just wrote with buying a couple of 7b3's?  I don't know.

Shortage of components cause shortages not corner cutting.  Shortage of people could cause cost cutting. For the most part the world missed 3-6 months of manufacturing. EVERYTHING is short not. Leading to supply chain issues everywhere. Waiting for GIK due to fabric shortages.  This is bad time to buy. Discounts are short and demand seems to be high. 

Now is the right time

Millercarbon is correct except for buying Bitcoin. You can bet your &$) it will be outlawed sooner than later. Specifically because of the ransoms associated with the crypto currency. Gold, platinum, silver. That’s the ticket 

I do not think so especially if they are reputable but i think the reason for the delays are because they do not want to cut corners and compromise quality.