Is this an right time to buy hifi?

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.

Never buy Bitcoin, and silver and gold aren’t that great of investments. There are so many better investments to make out there.
As for an audio system, car, and other tangibles, these are not investments, they lose money the minute you take them out of the showroom. A house is normally not an investment either.
I would never buy a car or audio system on credit because you will be upside down in owing more than what they are worth.
Buy what you can afford

@millercarbon Fed printing, precious metals, crypto: All agreed. 
@p05129 Not that this is a digital currency forum, but Google large (US by the way) institutional holdings now and you’ll quickly see why your next audiophile component will soon be transacted through crypto. It’s an inevitable reality with today’s market infrastructure. 

MC and the rest - one day you'll be right:
https://en.wikipedia.org/wiki/List_of_dates_predicted_for_apocalyptic_events
But not today it seems. 

Some of these lists are complete twaddle.