IMO only if you live in an Earthquake prone area.
I don't recommend you collect toys as a means of financial investment (i.e. to profit from future resale). The main reason for this is because toys:
a. Not all toys appreciate in value. Some actually depreciate.
b. In general toys do not appreciate well compared to other 'standard' forms of investment e.g. property, blue chips, shares, stock market etc. If you want to invest, you're better off buying one of those things rather than toys.
IMO if you want to collect toys, do it because you like it and because it's fun for you. Not because you hope to profit from it one day in the future. If you want to invest for the future, buy stock market shares.
If you want to collect your packaging for collecting's sake and are running out of room, then perhaps consider flattening your boxes. That way you can still unflatten them later if you want to look at them or whatever, but reflatten them for storage. But otherwise packaging does waste a LOT of space.