As we all remember from 2018, many fundamental projects with technologically strong ambitions simply did not survive it.
Would like to know what you are considering as fundamentally strong? or is your judgement fundamentally wrong. If you assuming altcoins as your candidate, then more than 99% of attempts your will bring up a fundamentally weak asset.
The only asset which is fundamentally strong is Bitcoin. It has a basis to run deflationary, it is decentralized and censorship-resistant.
do you think their technological potential will be able to survive the next trend? How strongly people value technology over speculation in 2021.
Techno potential or a lot of vaporware? Back in 2009 people used think 2021 would be the age of overlapping highways and flying cars. Did that happen so fast? Nope, but in progress anyway. Same here in crypto. No specific tech can be huge, but they will all have ups and downs. You have to decide what comes as a competition to bitcoin, even remotely. Only such currencies can survive multiple bull bear cycles.