I have a view as long as in this world do not use a single currency, forex trading will still exist, even for example there is an internet apocalypse. For example, there is no internet, actually trading activities can still be carried out offline, just like the discovery of the candlestick from Japan from the rice trade, by observing the candlestick rice traders can understand market conditions. For information on the news first as well as manuals, from the rice production center (paddy farming) to the center of the market, there is a system of market players placing people at the roof of the house with a flag as a symbol of the conditions being faced.
This means that even though not online or say not using the internet we can still be able to trade manually. All we have to do is adjust to the situation that used to be online, now it is offline, of course, it will be harder if we still want to become a trader