There is a common saying, "the future starts now."
Maybe they mean large-scale trade. In fact, we have started the future of international trade with bitcoin payments for a long time through this forum. And citibank also needs to venture further to various market sites in the world, especially dark web.

The fundamental pillars to their conditional ("could") claim, are depicted on pages 83 and 84 of their full report, and are describes as bitcoin having a:

They analyse the set of past and present evolution of bitcoin, the set of services that have been created and matured overtime, and take a peep at what the future may layout, amidst some uncertainties. The report does not solely focus on bitcoin as a currency for international trade, but also explores the venues of its role as digital gold, a new type of payment system, and its role as a crypto North Star.

Full report:
https://ir.citi.com/_tpHpW8MfaZ1QXwGmP1JGMGXXI95qXm3IMJzUJScLMb6XIjtOls6EbDehXMR3B_o9Opi7mdc5tQ%3D

Depends though, maybe there are people using it as a asset and then some passing it as a currency for cross border payments, which I think was one of the reason why Satoshi created it in the first place. So what the report says could be happening already, as you can send bitcoin or even other crypto's across the border. Specially in the sector of remittances, wherein crypto will shine the most.

It really doesn't matter what you think(and I'm saying this in a polite and an non-aggressive way). Not because bitcoin is mostly used as a hedging asset(SoV) and as a speculative investment, it doesn't mean that some other people or companies wouldn't be able to use it as a currency.

Assuming that:

• bitcoin continues to grow in marketcap from here
• government regulations finally calm down
• various governments worldwide make up their minds on what their stance is with Bitcoin and cryptocurrencies in general
• bitcoin becomes more available to other countries and cities worldwide

then it's a pretty safe assumption that volatility will decrease to some extent. I think it's highly likely.

While most people are viewing Bitcoin as a store of a value, Citi has elaborated on how Bitcoin's technology still has great potential and how it has great influence. Bitcoin can very well inspire new business models emerging in the blockchain. More and more companies are utilizing the blockchain technology and digital assets. Blockchain development is becoming a more in-demand skill. The report made by Citi is entitled "Bitcoin: At the tipping point" which is very fitting as I view crypto to be on the brink of major breakthrough especially with all these continuous development and institutional adoption.

Sure, it's possible that one day it's going to be used the way described in the article but for that to happen countries would have to create legal frameworks and treat bitcoin transactions as binding.
I feel like the most common use of bitcoin will be holding followed by a high value transfers made by the private sector (companies and wealthy individuals). Nobody is going to use bitcoin to buy a pizza but it's going to be your first choice when you decide to buy a private jet or an island.

Well, this fact is pretty obvious. Bitcoin enables its users to make almost instant transfer from one part of the world to the other with insignificant fees. Especially when you're making transactions worth millions of dollars, a few bucks in fees is basically nothing.

The average joe is benefiting from this feature as well. Some might argue that the transaction fee on Bitcoin is sometimes too big for normal day-to-day transaction, but we all know that seldom happens. Though, I am confident that Ligthning network will solve this issue.

Bitcoin is an assets to some people but not am assets to some people, because not everybody invest in cryptocurrency especially bitcoin, because only people that know Bitcoin as an assets is people who knows the rudiments of bitcoin for longtime, currency advert are backsliding because of the level of castigation people talk about cryptocurrency, most especially in all these countries that their government restrict cryptocurrency transaction's via countries currently, so I think with such measure people will not like to invest with Bitcoin again.

A problem of  international trade has always been the difference in currency. World economist are driving at a solution which involves a single currency accepted worldwide, bitcoin could be that currency. But first, before it can achieve such, it's price valiue has to meet a stable point.