panic buying, frenzy, that’s all there is to it,

Fears of a lockdown prompted a rush of panic buying, and supermarkets stayed open late to meet demand. In other Chinese megacities, mass testing in response to initial coronavirus cases has sometimes preceded more stringent lockdowns.

One woman was seen in disgraceful viral footage pulling out the hair of another over toilet paper amid coronavirus panic buying frenzy


Spiraling Coronavirus Fears Are Causing Financial Carnage
There is nothing investors hate more than uncertainty. Right now, that is all there is.

Explanation: "That's all there is to it" can mean roughly "It's as simple as that" and "there's nothing (more) to it" (although this is not a common saying), but not really "and that's all she wrote," which implies the end of something and is used in different situations.2009/06/05

Panic buying - Wikipedia

Panic buying occurs when consumers buy unusually large amounts of a product in anticipation of, or after, a disaster or perceived disaster, ...

‎Examples · ‎COVID-19 pandemic · ‎Gallery

frenzy 

(an example of) uncontrolled and excited behaviour or emotion that is sometimes violent:

In a frenzy of rage she hit him.

the media frenzy over the celebrity wedding

The audience worked/whipped themselves into a frenzy as they waited for her to come on stage.

There was a frenzy of activity in the financial markets yesterday.

In a moment of jealous frenzy, she cut the sleeves off all his shirts.

【名】 〔精神状態の〕逆上、激高 〔行動の〕激発、狂乱 〔一時的な〕精神錯乱 【他動】（人）を逆...【

逆上(frenzy)



that’s all there is to it 〘話〙(状況などをまとめて) ただそれだけのことだ, そういうことだ• She’s prettier than me and that’s all there is to it.彼女は私よりきれい，そういうこと．(簡単なことを強調して) ただそれだけでいい, どうってことない