With the lockin of BIP 91, many anticipate that the activation of SegWit will be a go, which will help prevent a split of the bitcoin blockchain that would generate two versions of the same cryptocurrency. However, some experts still believe that the crypto is not entirely in the clear yet, as some miners may still reconsider BIP 91 before SegWit activation. Only time will tell if a split will be a definite problem. I guess we'll find out on August 1st.