I read an article where it was stated that:

"To store most other altcoins you will need to download the wallets created specifically by their developers. If you’re collecting many altcoins this can be very time consuming and requires additional space on your computer to download all their blockchain data. You’ll also need to make sure these wallets are up to date in case there are major upgrades. "

It is the last sentance I am a bit troubled about:

"You’ll also need to make sure these wallets are up to date in case there are major upgrades. "

 If you don't do this and keep the wallet updated, can you end up losing your coins?

The article was here: https://cryptohustle.com/bitcoin-and-cryptocurrencies-for-beginners