It is actually depends on how much regular activity you do on your Whatsapp account. If you have good conversation on your account and you have incoming messages as well as outgoing message activities then there are rare chances of blocking.
If your account is newly created or have less activities on it, then we recommend to increase it's activities in 2 ways.
1) by enagaging Whatsapp Account or 2) by joining some random Whatsapp groups.