Anything that can be done with an altcoin can and should be implemented on Bitcoin v0.1. Having multiple use cases tied to Bitcoin in this way makes the chain more resilient- capitalist miners defending the longest, most valuable, most useful chain which hasn't been hijacked by corporate leftist shills and an irreversible offchain settlement layer.
Why have hundreds of altcoins competing for mining resources each trying to accomplish only their own single network's goal, when they can support the overall chain having a protocol set in stone, free from the constant infighting of devs, useless upgrades, scams, and with a fixed supply?
Sound money for the world.
P2P cash for the world.
Free speech for the world.
Working together, we would guarantee the strength of the chain with hashpower forever. A utopia of individual use cases, minus the get rich quick scams.
Safe definitely has a good use case but will it be around in 10 years when miners have a choice between Bitcoin and its many many applications, which scales indefinitely? Someone will build decentralized storage on Bitcoin and if I had a choice to store my data verified by a chain that's been resilient in its original form since 2009, or a chain with 1/10th the hashpower and 1/1000th of the transactions? I know which one I'd choose if I wanted the maximum chance my data would be safe in 100 years.
I would suggest Safe tokenize on Bitcoin. A win-win for both communities.
Game Theory: most of us are guaranteed to be losers individually, until we all realize we can all win together. Every altcoin created in effect dilutes the supply for the "cryptocurrency" use case - we are our own worst enemy when we remain in warring factions. In the same way ponzi schemes of the past have been dismantled, altcoins will have their day in the poorhouse. Very few will survive. The ship is going to sink, maybe it's got another bull run in her, maybe not, and people too busy milking the scams for their last dollars of profit. Never in my life have I been lucky enough to experience anything like this…the lifeboat is right in front of us. Bitcoin scales indefinitely and can accomplish everything we need.
Good luck with Safe, the idea is great and I hope it succeeds. The humble opinion of this anon is that it has an astronomically better chance to succeed on Bitcoin.