Cargo airlines are enjoying a brief spike in demand only because belly-freight space on airliners have evaporated. The overall cargo market is still in decline, and will be in deep trouble when airliners return to the sky due to a further recession-led demand reduction. They represent a relatively small part of the overall global fleet of aeroplanes and pilot jobs in any case.
As mentioned above by others, there will be thousands of experienced pilots out of work over the next couple of years. Now is the worst time in the history of flight to spend £100k on pilot training. Remember, timing is key to joining this industry and you only get 1 go at it. Save your money for another day.
Please don’t ruin your lives in the blind pursuit of a dream, put your plans on hold and come back in a few years.