If you can memorize your Steem password, why not? But I guess no one here can do that. I was in a good mood and it was my trip to memorize my password yesterday (Steemit approved my account just yesterday) and I did it!!!! However, I can`t fully trust my brain so I saved it to my secured accounts online, to my laptop and phone, and to my journal. Hope, others will do the same. Dont just safe it to one place. If you are saving it to your social network accounts or other online accounts like yahoo, you have to make sure that it is a secure place.