If you are afraid others will see your password while you type, take your notebook with you to bathroom. 
I highly doubt anyone would barge into bathroom while you "use". 
I highly doubt anyone would barge into bathroom while you "use". Or take a clue from Edward Snowden - either paranoid enough or informed enough to only enter his decryption passwords when covered with a blanket.
Keep even your use of Bitcoin secret from anyone who you do not completely trust. They tell their friends, their friends tell their methhead cousin...