Merge branch 'liskdocs-19-mobile-dapp-guide' into gh-pages

docs/building-on-lisk/web3-app-development.mdx

@@ -325,7 +325,9 @@ thirdweb supports [Lisk](https://thirdweb.com/lisk) and many other EVM-compatibl
 In Web2 apps, data is typically stored in a centralized database.
 In Web3 apps, some data is stored on the blockchain, i.e., a decentralized database.
 How the data is stored is defined inside of smart contracts.
-However, not all data should always be stored on the blockchain, as it is quite expensive and slow to store large amounts of data onchain.
+However, it should be noted that onchain data on a public blockchain is visible to everyone and therefore not suitable for all types of data.
+Especially sensistive and private user data should not be stored on the blockchain, except it is encrypted.
+In addition, soring large amounts of data onchain is quite expensive and slow to store large amounts of data onchain.
 Therefore, Web3 apps sometimes use a combination of onchain storage and offchain storage.
 
 #### Data Access