Are you keeping them on the exchanges or downloading a wallet for each altcoin you buy? is there a multi wallet that has support for many altcoins?
I keep only small values on exchanges, usually coins I expect to sell in the near future.
The coins I value and I hold for long time (years) stay on paper wallets, actual wallets I've installed to get an address then either kept the recovery seed, either saved the wallet onto a couple of USB sticks.
"Keeping them on the exchanges" means the money is not in your possession and may never be!