Grin will be outdated once LTC implements mimblewimble.
Beam will be outdated once LTC implements mimblewimble.
ADA is being developed by academics with not a lot of real world success and they're behind on any possible schedule, their business plan also has little value for real world businesses.
I'd invest in none of them.
nice points laid out here. but ada remains a top cryptocurrency among the three. it is pofiable and people can choos.