I really think that the creation of new E currency is a threat to bitcoin.
No. Bitcoin is and will be the king of crypto second to none.
Like for example. Some investors may move their investments to other currency made.
That is just an assumption. Also even if they did change the mode of investment from bitcoin to some altcoin how will that change the position of bitcoin? It does not depend on what the investors are thinking.
If bitcoin for example has 100 investors in all, then several currency is made with the same value as bitcoin. (we say 3 currency)
then the 100 investors may move to other 3 currency to find more specific or easier way to earn money or inflate their investments.
Do you think these probability will occur?
Investors invest in different currencies but bitcoin is the primary mode of purchase of any asset in crypto other than fiat. So when they sell bitcoin to buy some other coin another investors will pick that bitcoin and thus liquidity is maintained. Everyone is willing to grab their share of bitcoins and so its demand is always there.