http://xi2nhkuzm2hzgyedprs3n65wmudrq4rekbzire67oomiwk5x5h6w7nqd.onion/en/get-started/faq
If you use a weak password, others will be able to brute force your keys file. If you backup your seed in the cloud, you'll be poorer soon. Is Monero 100% anonymous? There is no such thing as 100% anonymous. If nothing else, your anonymity set is the set of people using Monero.