I think by "2017 rally" they, Forbes, mean a shorter period of time, starting mid September 2017. That's when Bitcoin really jumped big, from $3,600 to $19,000 three months later. And the current rally has started in the end of September 2020, with BTC at around $11k, and if it is indeed a more more sustainable one, we can expect Bitcoin going over $60k in 2-3 months from now.
I don't know whether we will have similar bull run or not, but we can expect it to last at least 3 months. The demand is looking robust right now and if the additional supply is completely removed from the market then $60K or even $100K may be possible within 2021. The current rally is supported by solid fundamentals, so it is very much probable.