Was Crocodile stronger at Marineford? Or was he holding back in Alabasta?

 During the Alabasta arc, Crocodile displayed a level of power that was initially considered overwhelming by the Straw Hat Pirates. He possessed the Logia-type Devil Fruit called the Suna Suna no Mi (Sand-Sand Fruit), which granted him the ability to control and transform into sand. He had a reputation as a Shichibukai and controlled the desert kingdom of Alabasta from the shadows. His strength was showcased through his battles with Luffy and others. At Marineford, Crocodile was present as part of the war that took place at Marine Headquarters. While he did participate in the battle, he didn't display the same level of dominance as some other powerful characters present. This has led fans to speculate that he might not have been as strong as initially portrayed in Alabasta. It's important to note that power scaling and character abilities can be subject to interpretation and development by the author. Oda often keeps details deliberately open-ended to keep the story intriguing.

Is it possible to be successful without taking risks?

 It is generally difficult to achieve success without taking some risks. In many cases, taking calculated risks can be an important part of the process of achieving success. Risks can help to expose individuals and organizations to new opportunities and challenges that can lead to growth and development.

However, it is also important to recognize that not all risks are equal, and it is important to carefully consider the potential costs and benefits of any given risk before deciding to take it. Some risks may be worth taking because they offer the potential for significant rewards, while others may be too risky or unlikely to be worth the potential costs.

Ultimately, whether or not it is possible to be successful without taking risks will depend on the specific goals and circumstances of the individual or organization in question. In some cases, it may be possible to achieve success without taking significant risks, but in other cases, taking calculated risks may be an important part of the journey towards success.